Cathodic Protection Wrap Pipe
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Transcript of Cathodic Protection Wrap Pipe
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Cathodic protection was first described by SirHumphry Davyin a series of papers presented to theRoyal Society[2]
in London
in 1824. After a series of tests, the first application was to theHMS Samarang[3]in 1824.Sacrificial anodesmade
fromironwere attached to thecoppersheath of the hull below the waterline and dramatically reduced the corrosion rate of the
copper. However, a side effect of the CP was to increase marine growth. Copper, when corroding, releases copper ions which
have ananti-foulingeffect. Since excess marine growth affected the performance of the ship, theRoyal Navydecided that it
was better to allow the copper to corrode and have the benefit of reduced marine growth, so CP was not used further.
Davy was assisted in his experiments by his pupilMichael Faraday, who continued his research after Davy's death. In 1834, he
discovered the quantitative connection between corrosion weight loss and electric current and thus laid the foundation for the
future application of cathodic protection.[4]
Thomas Edisonexperimented with impressed current cathodic protection on ships in 1890, but was unsuccessful due to the
lack of a suitable current source and anode materials. It would be 100 years after Davy's experiment before cathodic protection
was used widely on oil pipelines in the United States[5]
[edit]Types
[edit]Galvanic CP
Galvanic anodesare designed and selected to have a more "active" voltage (more negativeelectrochemical potential) than the
metal of the structure (typically steel). For effective CP, the potential of the steel surface is polarized (pushed) more negative
until the surface has a uniform potential. At that stage, the driving force for the corrosion reaction is removed. The galvanic
anode continues to corrode, consuming the anode material until eventually it must be replaced. The polarization is caused by
the electron flow from the anode to the cathode. The driving force for the CP current is the difference in electrochemical
potential between the anode and the cathode.[6]
Galvanic or sacrificial anodes are made in various shapes and sizes usingalloysofzinc,magnesiumandaluminum.ASTM
Internationalpublishes standards on the composition and manufacturing of galvanic anodes.[7][8]
In order for galvanic cathodic protection to work, the anode must possess a lower (that is, more negative) potential than that of
the cathode (the structure to be protected). The table below shows a simplified galvanic series to show which metals can thus
be combined.[9]
Metal
Potential with respect to a Cu:CuSO4
reference electrode in neutral pH environment (volts)
Carbon, Graphite, Coke +0.3
Platinum 0 to -0.1
Mill scale on Steel -0.2
High Silicon Cast Iron -0.2
Copper, brass, bronze -0.2
Mild steel in concrete -0.2
Lead -0.5
Cast iron (not graphitized) -0.5
Mild steel (rusted) -0.2 to -0.5
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Mild steel (clean) -0.5 to -0.8
Commercially pure aluminum -0.8
Aluminum alloy (5% zinc) -1.05
Zinc -1.1
Magnesium Alloy (6% Al, 3% Zn, 0.15% Mn) -1.6
Commercially Pure Magnesium -1.75
[edit]Impressed current CP
For larger structures, galvanic anodes cannot deliver economically enough current to provide complete protection. Impressed
current cathodic protection (ICCP) systems use anodes connected to aDCpower source. Usually this will be acathodic
protection rectifier, which converts an AC power supply to a DC output. In the absence of an AC supply, alternative power
sources may be used, such as solar panels, wind power or gas powered thermoelectric generators[10][11]
Anodes for ICCP systems are available in a variety of shapes and sizes. Common anodes are tubular and solid rod shapes or
continuous ribbons of various materials. These include highsiliconcast iron,graphite,mixed metal
oxide,platinumandniobiumcoated wire and others.
[edit]Applications
[edit]Pipelines
An air cooled cathodic protection rectifier connected to a pipeline.
Pipelines are routinely protected by a coating supplemented with cathodic protection. An ICCP system for a pipeline would
consist of a DC power source, which is often an AC powered rectifier and an anode, or array of anodes buried in the ground
(the anodegroundbed).
The DC power source would typically have a DC output of between 10 and 50amperesand 50volts, but this depends on
several factors, such as the size of the pipeline. The positive DC output terminal would be connected viacablesto the anode
array, while another cable would connect the negative terminal of the rectifier to the pipeline, preferably through junction boxes
to allow measurements to be taken.[12]
Anodes can be installed in a vertical hole and backfilled with conductivecoke(a material that improves the performance and life
of the anodes) or laid in a prepared trench, surrounded by conductive coke and backfilled. The choice of grounded type and
size depends on the application, location and soil resistivity.[13]
The output of the DC source would then be adjusted to the optimum level after conducting various tests including
measurements ofelectrochemical potential.
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It is sometimes more economically viable to protect a pipeline using galvanic anodes. This is often the case on smaller
diameter pipelines of limited length.[14]
[edit]Ships
Cathodic protection on ships is often implemented by galvanic anodes attached to the hull, rather than using ICCP. Since ships
are regularly removed from the water for inspections and maintenance, it is a simple task to replace the galvanic anodes.[15]
Galvanic anodes are generally shaped to reduced drag in the water and fitted flush to the hull to also try to minimize drag.[16]
Smaller vessels, with non-metallic hulls, such as yachts, will also use galvanic anodes to protect areas such as the rudder, but
depend on an electrical connection between the anode and the item to be protected.
For ICCP on ships, a DC power supply is provided within the ship and the anodes mounted on the outside of the hull. The
anode cables are introduced into the ship via acompression seal fittingand routed to the DC power source. The negative cable
from the power supply is simply attached to the hull to complete the circuit. Ship ICCP anodes are flush-mounted, minimizing
the effects of drag on the ship, and located a minimum 5 ft below the light load line[17]in an area to avoid mechanical damage.
The current density required for protection is a function of velocity and considered when selecting the current capacity and
location of anode placement on the hull.
Some ships may require specialist treatment, for example aluminum hulls with steel fixtures will create an electrochemical cell
where the aluminum hull can act as a galvanic anode and corrosion is enhanced. In cases like this, aluminum or zinc galvanic
anodes can be used to offset the potential difference between the aluminum hull and the steel fixture.[18]If the steel fixtures are
large, several galvanic anodes may be required, or even a small ICCP system.
[edit]Marine
Marine CP covers many areas, jetties, harbors, offshore structures. The variety of different types of structure leads to a variety
of systems to provide protection. Typically, galvanic anodes are favored,[19]but ICCP can also often be used.
[edit]Steel in Concrete
The application to concrete reinforcement is slightly different in that the anodes and reference electrodes are usually embedded
in the concrete at the time of construction when the concrete is being poured. The usual technique for concrete buildings,
bridges and similar structures is to use ICCP,[20]but there are systems available that use the principle of galvanic CP as
well,[21][22][23]although in the UK at least, the use of galvanic anodes for atmospherically exposed reinforced concrete structures
is considered experimental.[24]
For ICCP, the principle is the same as any other ICCP system. However, in a typical atmospherically exposed concrete
structure such as a bridge, there will be many more anodes distributed through the structure as opposed to an array of anodes
as used on a pipeline. This makes for a more complicated system and usually an automatically controlled DC power source is
used, possibly with an option for remote monitoring and operation.[25]For buried or submerged structures, the treatment is
similar to that of any other buried or submerged structure.
Galvanic systems offer the advantage of being easier to fit retrospectively, since the anodes are fitted on the concrete surface
and do not need any control systems as ICCP does.
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For pipelines constructed from pre-stressed concrete cylinder pipe (PCCP), the techniques used for CP are generally as for
steel pipelines except that there is a need to take steps to avoid an excessive level of potential that can produce cause possible
damage to the prestressing wire[26]
The steel wire in a PCCP pipeline is stressed to the point that any corrosion of the wire can result in failure. An additional
problem is that any excessive hydrogen ions as a result of an excessively negative potential can cause hydrogen embrittlement
of the wire, also resulting in failure. The failure of too many wires will result in catastrophic failure of the PCCP.[27]To implement
ICCP therefore requires very careful control to ensure satisfactory protection. A simpler option is to use galvanic anodes, which
are self limiting and need no control.[28]
[edit]Internal CP
Vessels, pipelines and tanks which are used to store or transport liquids can also be protected from corrosion on their internal
surfaces by the use of cathodic protection.[29]
ICCP and galvanic systems can be used.[30]
[edit]Galvanized steel
Galvanizinggenerally refers tohot-dip galvanizingwhich is a way of coating steel with a layer of metallic zinc. Galvanized
coatings are quite durable in most environments because they combine the barrier properties of acoatingwith some of the
benefits of cathodic protection. If the zinc coating is scratched or otherwise locally damaged and steel is exposed, the
surrounding areas of zinc coating form a galvanic cell with the exposed steel and protect it from corrosion. This is a form of
localized cathodic protection - the zinc acts as a sacrificial anode.
It should be noted that galvanizing, while using the principle of cathodic protection, is not actually cathodic protection. CP
requires the anode to be separate from the metal surface to be protected, with an ionic connection through the electrolyte and
an electron connection through a connecting cable, bolt or similar. This means that any area of the protected structure within
the electrolyte can be protected, whereas in the case of galvanizing, only areas very close to the zinc are protected. Hence, a
larger area of bare steel would only be protected around the edges.
[edit]Testing
Electrochemical corrosion potentialis measured withreference electrodes.Copper-copper(II) sulfate electrodesare used for
structures in contact withsoilor fresh water.Silver chloride electrodesorSaturated calomel electrodes(SCE) are used
forseawaterapplications. The methods are described in[31]
along with the sources of error[32]
in the voltage that appears on the
display of the meter. Interpretation of electrochemical corrosion potential measurements to determine the potential at the
interface between the anode of the corrosion cell and the electrolyte requires training[33]and cannot be expected to match the
accuracy of measurements done in laboratory work. It is widely recognized that errors can be introduced in all measurements
where there is a lack of training.
[edit]Problems
[edit]Production of hydrogen ions
A side effect of improperly applied cathodic protection is the production ofhydrogenions, leading to its absorption in the
protected metal and subsequenthydrogen embrittlementof welds and materials with high hardness. Under normal conditions,
the ionic hydrogen will combine at the metal surface to create hydrogen gas, which cannot penetrate the metal. Hydrogen ions,
however, are small enough to pass through the crystalline steel structure, and lead in some cases to hydrogen embrittlement.
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ialhttp://en.wikipedia.org/w/index.php?title=Cathodic_protection&action=edit§ion=12http://en.wikipedia.org/wiki/Coatinghttp://en.wikipedia.org/wiki/Hot-dip_galvanizinghttp://en.wikipedia.org/wiki/Galvanizinghttp://en.wikipedia.org/w/index.php?title=Cathodic_protection&action=edit§ion=11http://en.wikipedia.org/wiki/Cathodic_protection#cite_note-29http://en.wikipedia.org/wiki/Cathodic_protection#cite_note-28http://en.wikipedia.org/w/index.php?title=Cathodic_protection&action=edit§ion=10http://en.wikipedia.org/wiki/Cathodic_protection#cite_note-27http://en.wikipedia.org/wiki/Cathodic_protection#cite_note-26http://en.wikipedia.org/wiki/Cathodic_protection#cite_note-25 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[edit]Cathodic Disbonding
This is a process of disbondment of protective coatings from the protected structure (cathode) due to the formation of hydrogen
ions over the surface of the protected material (cathode).[34]Disbonding can be exacerbated by an increase in alkali ions and an
increase in cathodic polarization.[35]The degree of disbonding is also reliant on the type of coating, with some coatings affected
more than others.[36]Cathodic protection systems should be operated so that the structure does not become excessively
polarized,[37]since this also promotes disbonding due to excessively negative potentials. Cathodic disbonding occurs rapidly in
pipelines that contain hot fluids because the process is accelerated by heat flow[citation needed].
[edit]Cathodic Shielding
Effectiveness of cathodic protection systems on steel pipelines can be impaired by the use of solid film backed dielectric
coatings such as polyethylene tapes, shrinkable pipeline sleeves, and factory applied single or multiple solid film coatings. This
phenomenon occurs because of the high electrical resistivity of these f ilm backings.[38]Protective electric current from the
cathodic protection system is blocked or shielded from reaching the underlying metal by the highly resistive film backing.
Cathodic shielding was first defined in the 1980s as being a problem, and technical papers on the subject have been regularly
published since then.
A 1999 report[39]concerning a 20,600 bbl (3,280 m3). spill from aSaskatchewancrude oilline contains an excellent definition of
the cathodic shielding problem:
"The triple situation of disbondment of the (corrosion) coating, the dielectric nature of the coating and the unique
electrochemical environment established under the exterior coating, which acts as a shield to the electrical CP
current, is referred to as CP shielding. The combination of tenting and disbondment permits a corrosive environment
around the outside of the pipe to enter into the void between the exterior coating and the pipe surface. With the
development of this CP shielding phenomenon, impressed current from the CP system cannot access exposed metal
under the exterior coating to protect the pipe surface from the consequences of an aggressive corrosive environment.
The CP shielding phenomenon induces changes in the potential gradient of the CP system across the exterior
coating, which are further pronounced in areas of insufficient or sub-standard CP current emanating from the
pipeline's CP system. This produces an area on the pipeline of insufficient CP defense against metal loss aggravated
by an exterior corrosive environment."
Cathodic shielding is referenced in a number of the standards listed below. Newly issued USDOT regulation Title
49CFR192.112, in the section forAdditional design requirements for steel pipe using alternative maximum allowable
operating pressure requires that "The pipe must be protected against external corrosion by a non-shielding coating" (see
coatings section on standard). Also, the NACE SP0169:2007 standard defines shielding in section 2, cautions against the
use of materials that create electrical shielding in section 4.2.3, cautions against use of external coatings that create
electrical shielding in section 5.1.2.3, and instructs readers to take 'appropriate action' when the effects of electrical
shielding of CP current are detected on an operating pipeline in section 10.9.
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Known a s a leader in the industry, the Kingdom has witnessed major
developments in the pipeline industry. To meet the demands of the harsh
environment and for protection of cross-country and sub-sea oil, water and
gas pipelines against corrosion the Al-Qahtani Pipe Coating Terminal was
established in 1954. Since those early days when coat and wrap were used,the Company has rapidly moved to new technological advantages available
today and has three coating plants in the Kingdom equipped with the latest
coating techniques.
Nature of Business
Corrosion Control Coatings and other Shop Services
Internal & External Fusion Bonded Epoxy Coating
External 3 layer polyethylene and polypropylene coating
External Heat Activated tape wrap
Internal Cement Lining
Internal & External Liquid Coating
Internal & External Coating of Girth Welds
Custom Coatings
Applied Coatings for Heat Exchangers, Vessels and Boilers
Weight coating by impingement and compression methods
Double Joint Welding of Pipes
Fabrication (cutting, rebevelling and welding)
Field Coatings & Related Services
Internal & External FBE coating of Girth Welds
External Heat Shrink Sleeve Installation on Girth Welds
In-Situ Rehabilitation of Pipes
External Liquid Coatings
Thru-kote sleeves for shop & field installation.
Fusion Bonded Epoxy (FBE) Coatings
Fbe coatings, both internal & external, are essentially single layer (thin) coatings. These are designed for corrosion
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protection on steel substrates (especially pipes & fittings).
Al-Qahtani Pipe Coating is the licensee applicator for specialized coating systems in Saudi Arabia and the Middle
East. The high performance coating systems are basically intended for downhole tubular's, OCTG's, pipelines and in-
plant piping systems. The comprehensive range of epoxies, phenolic's & urethanes serve a wide range of uses in
stringent environments.
Thru-Kote UB connections are also marketed & installed by AQPCT under a license agreement. These are the only
weldable connections for surface pipings that help maintain continuous
coating integrity after welding.
Cement mortar lining
This type of lining / coating is used for pipelines for potable water.
Double jointing
This process is designed to join two double random length pipes into an 80
LF long double joint. This effectively reduces field welding / x-ray / girth
weld coating into half.
Fabrication
Shop welding has advantages over field welding. Spools can be welded and coated in the same location in ideal
conditions.
Three Layer (Polyethylene / Polypropylene) Coatings
3 LPE & 3LPP coatings are thick coatings, which not only provide the anti
corrosion properties of FBE which is the first layer (primer), but also
provides mechanical protection due to the thick layer of either PE or PP.
3LPE is rated for low temperature services, whereas 3LPP is rated for
services upto 120? C.
Al-Qahtani Pipe Coating was the first in Saudi Arabia and the Middle East
to apply 3 layer polyethylene coating on 80" diameter pipes for a SWCC
(Saline Water Conversion Corporation) water pipeline project. It was a
technological achievement to be able to perform such a difficult coating on
a very large diameter pipe in accordance to stringent specifications. By this
success, client's such as SWCC are not relieved of past design constraints
and can now design their future projects based on this higher diameter coating capability of AQPCT.
Negative buoyancy Concrete weight coatings
These are essentially applied to add weight to sub sea or subkha pipelines.
Weight coatings arenormally applied over any type of anti corrosion coatings
such as FBE epoxy or coal tar. Can be applied by two different methods,
compression coat or impingement.
Applied coatings for heat exchangers, vessels and boilers
Applied on internal and / or external surface of tube bundles, vessels, tanks,
etc. This coating prevents fouling & incrustation in the heat exchangers and
enhances life of the same. Maintenance / cleaning costs are greatly reduced
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due to less maintenance requirement.
Custom Coating
Al-Qahtani has the most modern and technically advanced facility for
applying External/Internal FBE, high temperature phenolic and other
coatings on pipe fittings, pipe spools, valves, vessels, heat exchangers,
tanks etc. These are professionally applied by highly skilled personnel to
very stringent standards. Girth weld coatings of precoated, prefabricated
pipes and fittings are applied in theshop as well as at client jobsites by
specially trained people.
Internal Fusion Bonded Epoxy Coating Of Field Girth Welds
Al-Qahtani Pipe Coating Terminal developed the capability to coat the
internal girth weld area of the coated pipes from sizes 12.750 inch up to 60
inch diameter. Capabilities can be developed for larger diameters if so required by clients. This service contributes to
providing an end-to-end corrosion protection system with fusion bonded epoxy. The most modern internal line travel
equipment performs functions of cleaning, vacuuming, coating and video inspection of the girth weld area.
External Fusion Bonded Epoxy Coating Of Field Girthwelds
Al-Qahtani Pipe Coating Terminal also developed the capability to coat the external girth weld area of the coated
pipes from sizes 2 inch up to 60 inch diameter. Capabilities can be developed for larger diameters if so required by
clients. This service contributes to providing an end-to-end corrosion protection system with fusion bonded epoxy.
Pipeline Rehabilitation
Al-Qahtani Pipe Coating Terminal developed its own spread of line travel equipment for hydroblast cleaning, sand
preblasting, grit blasting, spray coating of the external surface of pipe. Pipelines where tape coatings or similar
coatings have failed are field rehabilitated while in service or out of service using in-situ techniques to remove failed
coatings like tape wraps or other external coatings and reapplied with liquid coatings like coal tar / polyurethane.
Joint Wrap Tapes for Steel PipeWeld Bead
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Product Description
Name: Joint wrap tapes for steel pipe weld bead
Type: SXT365, 380, 3100, 3130
Brand: QIANGKE
Features:
The tape consists of two layers, which are adhesive (inner layer of butyl rubber)
And film (outer layer of polyethylene)
Tapes specifications:
1) SXT-365 with 0.65mm / 25mil thickness and 50 - 800mm width
2) SXT-380 with 0.76mm / 30mil thickness and 50 - 800mm width
3) SXT-3100 with 1.02mm / 40mil thickness and 50 - 800mm width4) SXT-3130 with 1.27mm / 50mil thickness and 50 - 800mm width
5) Thickness: 0.35mm - 1.50mm
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6) Width can be 50mm, 75mm, 100mm, 150mm, 230mm, 300mm
7) Length: 30 - 200m
Packing: Carton
HS Code: 391910999
Trademark: Qiangke
Model NO.: SXT
Productivity: 8000 sqm per day
Unit Price: US $ 2.8
Shipment Terms: Container
Minimum Order: 1 mt
Origin: China
Packing: carton
Type: Seal Tape
Export Markets: South America, Southeast Asia, Africa, Mid East,Eastern Asia
Company: Shandong Xunda Science TechnologyDevelopment Co., Ltd.
Three Layer Polypropylene Tape
System (3LPP)
PRODUCT DESCRIPTION
3LPP is similar with 3LPE coating system, the difference is instead of using Polyethylene as an outer layer, 3LPP uses Polypropylene tape. 3LPP is provide forimproved impact and abrasion resistance compared to 3LPE and is suitable with operation temperatures of more then 110 C. 3LPP consisting of a inner layer ofFusion Bonded Epoxy, copolymer adhesive layer and outer layer of Polyethylene. Inner layer provide corrosion protection and flexibility while outer layer ofPolyethylene provide impact and abrasion protection. Between the inner and outer layer are tape.
The total thickness and combination of various layers used will be in accordance to users spec
Internal Liquid
Epoxy Coating
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PRODUCT DESCRIPTION
This application uses a two-part liquid epoxy paint system which is applied in a single coat as anticorrosion protection for steel pipes. The first process the p ipesgo through are cleaning & blasting. Then liquid epoxy is applied to the pipes inner surface by spray guns in a bogey, forming a uniform single layer epoxy
which cure after application.
Three Layer Polyethylene
System (3LPE)
PRODUCT DESCRIPTION
3LPE is a coating system consisting of an inner layer of Fusion Bonded Epoxy, copolymer adhesive layer and outer layer of Polyethylene. Inner layer providecorrosion protection and flexibility while outer layer of Polyethylene provide impact and abrasion protection. Between the inner and outer layer are tape.
The total thickness and combination of various layers used will be in accordance with users specificatio
FBE
Coating
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PRODUCT DESCRIPTION
This application uses Fusion Bonded Epoxy (FBE) powder as anticorrosion protection for steel pipes. FBE is a uniform single layer film coating offering goodflexibility and excellence resistance to cathodic disbondment.
The first process the pipes endure are that they be cleaned & heated. Then the FBE powder is applied to the pipe surface by electrostatic guns, forming auniform single layer film which cure shortly after application.
For more severe abrasive & temperature conditions, Dual Layer FBE should be applied. Dual layer FBE is a dual powder abrasion resistant coating which isdesigned to provide excellent abrasion resistance to the pipes.
Spiral Welded Pipe
PRODUCT DESCRIPTION
Top-quality products win you market share, but to hold on to it you need top-quality service. That is why KHI Pipe provides a
package of services extending far beyond production.
TYPICAL PRODUCT PROPERTIES
Total Design Capacity : + 200,000 tons/year
Oil / Gas Line pipe Capacity : + 120000 tons/year
Structural / Pilling Capacity : 160,000 tons/year
Water Pipe Capacity : 160,000 tons/year
Diameter : 4.5 118
Wall Thickness : 3.2 mm25 mm
Material : Up to SMYS 70.000 Psi
ERW Pipe
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TYPICAL PRODUCT PROPERTIES
Total Design Capacity : + 70.000 Ton/year
Maximum speed : 40 metre/minute
Specification : API 5 L
Diameter : 4.5 12.75
Wall Thickness : 4.75 mm12.7 mm
Material : Grade material max API X-65
Cement
Mortar
Lining
PRODUCT DESCRIPTION
Coating mortar lined pipes are centrifugally lined at the factory to assure that the best possible quality control is maintained and that a uniform thickness ofmortar is distributed throughout the entire length of pipe. Cement linings prevent tuberculation by creating a high pH at the pipe wall, and ultimately byproviding a physical barrier to the water. Cement linings are also smooth, which results in a high flow coefficient.
Pipe Corrosion protection inner wrapping tapeComposition: It is tape-shaped anticorrosion material made of Polyethylene film heat laminated with adhesive layer of butyl glue.
Usage: It is extensively used in the pipework of oil and natural gas transportation, petrochemical industry, electric power, metallurgy,
urban natural gas network of pipes, the outside anticorrosion project of the metal pipes involved as well as the outside anticorrosion
project of the underground and overhead metallic conduit of the works of petrochemical industry, natural gas and coal transportation
Thickness: 0.30 - 1.30mm
Width: 50, 75, 100, 150, 230, 300mm
Length: 30 - 200m
Features:
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Excellent adhesion to pipe and self
Resistant to UV
Can be applied over a wide temperature range
Good conformability and consistent uniform thickness
Easily applied with no special equipment
Compatible with common pipe coatings
Excellent resistance to cathodic disbondingMeets ASTM D1000 Standard
Cold applied
Application:
Prepare surfaces by removing all loose scale, rust or other foreign matter by grit blasting or wire brush. Surface must be clean, dry and
free of grease. Apply thin film of Butyl Primer to all surfaces to be wrapped and allow to dry. Peel back interleaving and apply adhesive
side of the tape to the surface and press down. Apply the tape spirally with enough tension to make it conform. Remove interleaving as
wrapping proceeds. Overlap each turn by at least 1" or 55% to achieve double thickness.
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Quick Details
Material: PE Type: Other Usage: Packaging Film
Feature: anticorrosion Hardness: Soft Transparency: Opaque
Place of Origin: Shandong
China (Mainland)Brand Name: XUNDA Model Number: T 150 250
Color: White,BlackMaterial: PE and butyl
rubberThickness: 20 mils
Tensile strength: 25 N/cm Application: Corrosionprotection material Manager system: ISO9001,ISO 14001,OHSMS
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18001
Test report: SGS
Packaging & Delivery
Packaging
Detail: 360*360*320 mm
Delivery Detail: 7 days
Specifications
Inner layer: butyl rubber
Outer layer: polyethylene
Thickness: 0.80 mm to 2.0 mm
Width: 50-900mm
Length: 30 -400 m
Cold applied coating adhesive tape :Polyethene is used as the base material which is coated by the liquid butyl rubber film,
both of which are pressed and compounded. It is mainly used on underground, underwater and overhead pipelines.
Inner Wrap : provides a permanent bond to the primed steel pipes surface and provides protection against chemical
electrolytic corrosion for under ground and off shore pipeline.
The main Materials used are stabilized Polyethylene backing and Butyl Rubber base synthetic adhesive
Outer wrap
provides a permanent bond to the primed steel pipes surface and provides protection against chemical electrolytic corrosion
for under ground and off shore pipeline.
The main Materials used are stabilized Polyethylene backing and Butyl Rubber base synthetic adhesive
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Quick Details
Material: PE Use: Masking Adhesive Side: Single Sided
Adhesive: RubberAdhesive Type: Hot Melt, Pressure
Sensitive
Design Printing: No
Printing
Place of
Origin: Shandong
China (Mainland)
Brand Name: XUNDA Color: Black,White,Gray
Film: Polythylene Adhesive: Butyl rubberManager system: ISO
9001,ISO 14001,OHSMS
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18001
Application: steel
pipe surface corrosion
resis...
Coating
system: Primer,innerwrap,outerwrap
Packaging & Delivery
Packaging
Detail:310*310*320, 3 rolls per carton
Delivery Detail: 7 days
Specifications
Inner tape (Anticorrosion Tape),
Outer tape (Protective Tape),
PE Tape in Jumbo Roll,
Polyethylene Tape in Master Roll
1.Product Catalog:
XUNDA TAPE is mainly engaged in five series of products, which are Inner Tape, Outer Tape, Joint Tape, Tape Primer, and Putty Tape
with 10 categories in nearly 100 specifications. They can be used for the purposes of steel pipe surface corrosion resistance for various
pipelines in facility projects of petroleum, petrochemical industry, city gas, oil and gas storage and transportation, power, water supply,
metallurgy, civil aviation, etc.
1.1 Inner tape: XUNDA-T 100 series
(Anticorrosion tape, Anti corrosion tape, Anticorrosive tape) is for anticorrosion of underground, underwater, & overhead pipelines.
Features:
1) The specification of the tape consists of two layers, adhesive and film
2) Inner layer: butyl rubber
3) Outer layer: polyethylene
4) Thickness: 0.38 - 1.27mm
5) Width: 50mm, 75mm, 100mm, 150mm, 230mm, 300mm,500 mm,800mm,900mm
6) Length: 30 - 300m
1.2 Outer tape: XUNDA T 200 series
(Protection Tape, Protective Tape) is for protection of pipe and the surface of Inner Tape from damages.
Features:
1) The specification of the tape consists of two layers, adhesive and film
2) Inner layer: butyl rubber
3) Outer layer: polyethylene
4) Thickness: 0.40 - 1.30mm
5) Width: 50mm, 75mm, 100mm, 150mm, 230mm, 300mm,500 mm,800mm,900mm
6) Length: 30 - 300m
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1.3 Joint tape: XUNDa T 300 series
(Polyethylene Tape, Polyethylene Tapes, PE Tape, Rubber Tape, Butyl Tape, Butyl Rubber Tape) is for anticorrosion of field joints,
fittings, & specifically piping.
Features:
Component: backing: Polyethylene PE & adhesive: butyl rubber
Thickness: 0.38mm to 1.27mm,
Width: 50mm to 300mm
Length: 30 to 300m
1.4. Tape Primer:
(Synthetic Primer) complementary product covers of the rusting steel pipe and enable to enhance the adhesive to the pipe since it is
working with the adhesive of the polyethylene tape.
P19: Solid content 19%;
P27: Solid content 27%.
1.5. P-00 Primer, Paint Primer, Primer Paints Series Coating Systems AWWA C-214 Standard
Type of the Primer P-19 P-27
Base Rubber and Synthetic Rubber and Synthetic
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Resins Resins
Solid Content 19% 27%
Colour Black Black
Weight / Liter 0.79 KG 0.81 Kg
Flash Point +10o
F to +50o
F, -12o
C to+ 10 oC
+10o
F to +50o
F, -12o
C to+ 10 oC
Viscosity ( Time for flow 4mm
nozzle over)10 to 20 Second 15 to 30 Second
Place of Origin: Shandong
China (Mainland)Brand Name: Xunda Model Number: XUNDA T200
Type: Insulation Sheet Material: PE Application: High Temperature
Rated Voltage: 120 Tensile Strength: 50N Backing: Polyethylene
Adhsive: Butyl rubber colour: Black or white Thickness: 0.5mm-1.5mm
Standard: DIN 30672 Peel strength: 55N/Kg Elongation at break: 400%
Usage: Pipeline corrosion
protectionPipeline: Oil,,Gas water
Matched with: Inner
aticoorosion tape
Packaging & Delivery
PackagingDetail: 310*330*320 12Roll
Delivery Detail: 5 days
Specifications
polyethylene tape
1. Cold applied tape
2. Coating system for corrosion protection of all types of underground or overhead pip
20mil outer polyethylene tape
Description
20mil outer polyethylene tape is a synthetic rubber-based material extruded into a soft permanently elastic strip, available in a roll form.
The tape possesses high levels of surface tack and performs at a wide range of temperatures.
Application
20mil outer polyethylene tape Provides a permanent bond to the primed steel pipes surface and provides protection against chemical
electrolytic corrosion for underground pipelines.
long term corrosion protection
High chemical resistance under service temperature.
Complies with EN-DIN 12068 and AWWAC-214 international standards and also IGS and IPS Iranian standards.
Outstanding electric property and permanent adhesion.
Note : Various wide , length and thickness are available for unique project requirement .
Item Name Polyethylene tapes, PE coating tapes, pipe wrap polyethylenetapes,
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Aluminum tape, polyethylene adhesive tape, butyl rubber
adhesive tape
Size of
Products1roll/set ,200ft*150mm,100ft*100mm
Material Butyl rubber Bituminous Compound and Adhesion PromotingResins
Structure 2 layers without primer,PE + adhesive
Product Color white, Black, yellow, grey
Packingshrink wrap+2pcs color labels(color labels can print customer
logo)
Package 4,6,12,24 sets/ carton
MOQ 500 roll
Samples Lead
timewithin 7 days
Payment Term 30% deposit, the balance against copy of shipping documents
Trading Term FOBGUANGZHOU/FOBSHENZHEN/FOBSHANGHAI/CIT
Delivery Date Within 10days after confirm your PO.
Country Of
Original:Shandong China
Usage:
It can be use on gas ,oil, water pipeline
polyethylene,underground overhead
Excellent adhesion to inner-layer tape and self Resistant to UV
Provides long-term corrosion protection to steel pipelines.
Repair of damaged factory applied corrosion protection.
Outlining weld beads and cut backs prior to wrapping bare-welded joints.
Outlining seams on spiral and seam welded pipe.
Primerless mastic tape readily conformable to odd-shaped pipe
fittings, valves, flanges and other buried structures.
Recommended
Temperatures
Application Temperature: from +5C to +50C
Continuous Temperature: from30C to +60C
Peak Temperature: up to +70C
PE coating extrusion system of big bore steel pipe is one of JINHU mainly
equipments, we have sold lines abroad over 40 sets since the line developed in
2001 year. They were export to countries such as Pakistan, Nigeria, South Africa,
Kenya, Sudan, and Iran etc. stable Product property, dependable quality,
reasonable prices and customer satisfaction. We have been appointed as excellent
supplier by China petroleum Pipe Company of engineering, Yadong Company,
Ruichen Company. Our line output is twice higher than other domestic like product,
lower energy consumption, to realize the cost control and reached to international
advanced level.
As a special manufacturer, we supply customers PE extrusion 500-3000kg/h with
different type and specification extrusion equipment and down lines, such as drying
system, auto-feeding system, extrusion adaptor, screen changer and tilter system.
Droppable upper wrapping type PE coatingsystem
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Two types include coating type and wrapping type, wrapping type divided into upper
wrapping type and side wrapping type. As per customers requirement, equipment
can be fixed put, drop put or several extruders combine together for use.
Coating type steel pipe get through the die tooling and then coating, mainly fit for
600mm below steel pipe coating, have the merits of convenient use, coating well-
distributed, surface smooth and bright and low cost. Straight line transportation and
wrap coating, different size steel pipe coating with different type of die tooling.
Side wrapping type with die tooling beneath steel pipe, PE and adhesive rollers
nether, adhesive and PE extruder are set up vertically (also can set
High efficiency PE special extruder
Combine side wrapping type PE coating
system
up parallelly to save place), extruders moveable as per distance between die tooling and steel pipe specification, also die tool ing
adjustable up & down as per angle between sheet between steel pipe to assure sheet can be wrapping on steel pipe smoothly. Easy
adjustment and low coast, also can work without guide roller. Also have some disadvantages such as output low, energy cost, operation
affected due to PE and adhesive rollers below the steel pipe, must equip with auxiliary roller when processing small steel pipe(below
762mm ),or the steel pipe easy jump and produce bubble in coating layer to effect product quality.
Drop put type on the base of upper set type to set extruders on the side of line (on the drop hydraulic stable as per requirement), two
sets die tooling also can be adjustable as per requirement, neednt to adjust the runner angle and easy operation; not easy to born out
and leaking caused by depart the die tooling runner, make the PE extruder adaptor more short so as to decrease pressure missing and
save energy and to increase the output. Those types can be adjusting the whole line conveniently, also save cost to achieve good
effectiveness. But the drop stable increased the cost.
ZHEJIANG JINHU PLASTIC MACHINERY CO., LTD.
Add: No.299 Hong Sheng Road, B Zhoushan Economic Development Zone, Zhoushan, Zhejiang, P.R.China
Tel: 0580-2680268 2680008 2681888 2681818 2680188 2680808
Fax: 0580-2681666P.C: 316001
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ebsite: http://www.jinhu-china.com
E-mail: [email protected]