Activities Associated with Major Pipeline Construction...

Activities Associated with Major Pipeline Construction Projects

1

Service ROW Surveying & Staking General Description

Prior to Right of Way Surveying and Staking Enbridge engages in community consultation to identify any site specific concerns. Upon resolution of concerns, the survey commences. This is the process of determining precisely the most feasible route for locating the pipeline across a vast area, which may consist of different geophysical conditions and anomalies that may dictate the course in which the pipeline traverses through that territory.

Surveying techniques to be specified may include:

o GPS;

o Conventional;

o 3D;

o Heli-portable;

o In-land marine.

Staking is the process of placing stakes on the ground at the centre point of the line to mark the best course for the pipeline to take.

Equipment may include:

Trucks

Utility Terrain Vehicles

All Terrain Vehicles

Boats

GPS Receivers

Personnel may include:

Two or more persons per job

CSC Certified Surveyors

Trained in industrial health, safety, environment (HSE)

Minimum Certification

Satisfactory ISNetworld rating

Satisfactory WCB coverage

Satisfactory insurance

When is this Service Required? During pre-construction and construction phases.

Service ROW Clearing General Description

This is the process of clearing and removing vegetation and natural obstructions from the surface of the land running the entire length of the ROW, clearing room on either side of the centre line staked out for the pipeline to accommodate movement of personnel, materials and equipment during construction.

Clearing methods may include:

o Slashing;

o Logging and salvage;

o Stump removal;

o Mulching;

o Hauling away debris.


Forestry equipment

Dozers

Mulching machines

Log trucks

Chain saws


Usually one person per piece of equipment

Trained in industrial HSE

Trained in heavy equipment operation


Heavy equipment operators tickets




When is this Service Required? During pre-construction phase.

2

Service ROW Grading – Topsoil Stripping General Description

This is the process of leveling the surface of the ROW to a consistent grade to permit ease of construction and so the pipeline has as few bends as possible to accommodate undulating terrain.

Graded areas may be sloped away from the centre to permit water to run off after rain storms.

This process also prevents water from collecting in low lying areas causing mobile equipment to bog down in mud and slow the progress of construction.


Graders

Earth movers











Service Access Road Building General Description

Access road construction if typically part of the clearing and salvage operation.

Often pipelines are constructed across remote landscapes requiring that roads be constructed from scratch through difficult terrain with varying ground conditions.

Road building contractors need to be prepared for different conditions they may encounter and be able to build roads as specified with the least amount of ground disturbance and impact on the environment.

Contractors need to be able to transport personnel, equipment and material to and from construction locations and conduct construction activities safely and efficiently.

May involve moving earth, adding aggregate, installing culverts and hauling away debris.


Log trucks, rock trucks

Bull dozers, excavators, back hoes

Graders

Transport trucks and trailers











3

Service Line Locating General Description

Line locating is an underground pipe and utility line locating service that can involve an array of techniques to determine precise location and render this on a GPS map.

Others techniques involve electric AC and DC current detection.

Location can also be determined using ultrasonic or low frequency sound waves.

With modern technology, pipe and utility lines can be mapped for location, length and depth and in 3D imagery.


Hand held and mobile detection devices

Equipment must be up to date and GPS

compatible

May also require ATV equipment suitable for

rough and environmentally sensitive terrain


One person to handle one device Large jobs may require several

Personnel should also have: o H2S Alive o WHMIS o TDG o First Aid/CPR o Ground Disturbance Level II o Confined Space o CSTS Certified o Certified Tech I Line Locators o ATV Riders Course






Service Pilot Trucking General Description

Pilot trucking is the service of piloting oversized and wide load transports to and from work sites to ensure they arrive safely to their destination and are not a hazard to other users of the roadway.

Pilot trucking can also involve escorting other vehicles and transports through hazardous roadways, such as remote logging roads, mountain roads with lots of hidden bends and narrow passages.

Some jobs may require only one pilot truck out front, while others may require two trucks, one out front and the other following in the rear.


Pickup trucks and drivers

Equipped with emergency lights and

reflective warning signs

Rough terrain ready with heavy duty

suspension and 4X4 capability


One person per pilot truck trained in industrial HSE


Specialized driver training and associated tickets




When is this Service Required?

During construction phase.

4

Service Equipment & Field Hauling General Description

Equipment and field hauling involves transportation of equipment, pre-fabricated components, construction material and goods from source to and from field sites where they are needed.

Such hauling may involve light to heavy hauling using a wide range of transportation equipment suitable for both off road and on road maneuvering.

Trucks and trailers may require winches and/or cranes.

Trucks and trailers may require special features to make them environmentally friendly, such as tire pressure control sensors and floatation tires.


Equipment can vary as per the following

examples:

o 3 to 20 ton Knuckle Boom Picker Cranes

o 22 to 40 ton Stiff Boom Pickers

o 300” to 385” Bed Trucks/Texas Beds

o 30 to 40 ton Winch Tractors


One person per truck trained in industrial HSE



COR




When is this Service Required? During pre-construction, construction and post-construction phases.

Service - Prime Contract Trenching Page General Description

Trenching is the excavation of precision trenches or furrows within which the pipeline’s pipe is to be laid and subsequently buried using specialized equipment.

Trenching equipment ranges in size and weight depending on width and depth of the trench required.

Trenches required by Enbridge are usually for big inch (24”- 42”) pipe.

Trenching equipment must be reliable and capable of quality trench production.

Operators must be experienced in the use of the equipment.

Some trenches may require “benching”, a common method of excavating the sides of a trench in a series of horizontal levels or steps used either to trench deeper than the machine’s boom can reach or to prevent cave-ins.


Trackhoes, chain-saw type and/or bucket wheel trenching machines capable of operating in a variety of ground conditions incl. frozen ground, rock, tundra and clay

24" to 54" wide x 12" to 16' deep trench capability

Hauling trucks and trailers to transport trenching equipment as required











5

Service - Prime Contract Trench Material Crushing/Backfilling General Description

This is the process of crushing material excavated from the trench into fine aggregate and placing it back in the trench to serve as padding for the bottom of the pipe.

Equipment is available in varying sizes depending on the size of the trench and the kind of material excavated.

Some equipment can crush stones up to 16” in diameter.

This procedure is deployed to help protect the pipe and its coating as the pipe will be resting on this material during its lifetime.


Self propelled and radio controlled crushing machines capable of dispensing material into the trench from either side of travel direction.











Service Applying Tackifier/Erosion Protection General Description

This is the process of spraying an organic or biodegradable substance over excavation piles or rows to “tack down” top soil to prevent it from being blown away until such time as it is needed to be placed back to bury the pipeline.

There are a variety of substances used as “tackifier” depending on the length of time piles or rows are expected to be exposed above ground.

Tackifier can be sprayed by hand or by mobile trucks with tanks and pumps capable of doing large areas and covering long distances on a single pass.

Another method to prevent erosion is the use of erosion mats, which may be part of the tackifier service or a separate contract depending on the amount of erosion control required.


Tank truck with electric pump

Pressure nozzles

Off road capable

Erosion mats









6

Service Pipe Transporting to Site General Description

This is the process of getting the pipe to the construction site, often across varying

road surfaces and varying distances.

May involve transporting pipe from nearby pipe stockyards, rail yards or direct from

the regional distributor or mill.

May involve transporting pipe from coating factory.

Different pipe diameters may require different truck/trailer combinations and impact

the number of truck/trailer combinations required to deliver the pipe according to

precise schedules.

Involves handling and securing the pipe in such a manner as not to damage the pipe

or its coating during transporting it to the site.


On/Off road transports

On/Off road flatbed trailers


Usually one person per truck trained in industrial HSE


COR





Service – Prime Contract Pipe Stringing General Description

Pipe stringing is the process of taking the individual lengths of pipe from pipe

stockyards or off flatbed transports and laying them end to end beside the prepared

trench along the entire length of a pipeline segment in preparation for the welding

procedure.

Along a narrow right of way this can be a delicate procedure so as to avoid traffic

bottlenecking and minimize ground disturbance.

Side boom track dozers are often used as are cranes.


Track dozers equipped with side boom cranes

Specially designed roller cradles so as not to damage pipe coating


Usually one person per side boom crane trained in industrial HSE





When is this Service Required? During construction phases.

7

Service – Prime Contract Pipe Bending General Description

Often during construction of the pipeline there are variations in the contour of the

land and terrain conditions that require bending of the pipe to avoid costly re-

contouring of the land.

Bending of the pipe, especially large diameter pipe requires special machines that can

bend the pipe without altering its circular profile.

Skilled technicians can bend pipe to a certain degree quickly and efficiently on site without damaging the pipe, but large bends (elbows) usually require fabrication in factory settings.


Hydraulic pipe bending machines

Hydraulic, pneumatic and diesel mandrels that work with bending machines from inside the pipe


One or two operators for each piece of equipment trained in industrial HSE





When is this Service Required? During construction phase.

Service Hydro Testing the Pipe General Description

This is the process of testing the pipe to be assembled into a pipeline by sealing the ends of the pipe with pipe testing heads and filling them with water or emulsions subjected to high pressure.

The plates or test heads sealing the pipe ends are clamped hydraulically or welded directly to the pipe during the test.

Service should be capable of being delivered on the pipeline construction site.

Service should be capable of steel pipe data logging.

Winter testing may require the use of boilers to heat the test water and prevent freezing.


Equipment transport vehicles

Hydraulic clamps

Test heads

Pressure pumps

Analytical test trailer


Usually two or more persons per inspection job trained in industrial HSE

Sometimes test engineer required






8

Service – Prime Contract Pipe Welding General Description

Specialized welding companies are required to weld together the pipeline’s pipe as

the pipeline is constructed in the field.

Some elbows and valve joints can be welded off site in a controlled shop setting and

later shipped to the construction site for insertion in the pipeline.

Welding companies must be able to design and provide welding procedure

specifications to any of the following codes and standards:

o ASME;

o CWB;

o API;

o CSA;

o AWS;

o Transport Canada Quality Control.


Automated and manual welding equipment

Internal and external automated welding equipment

Lifting and pipe-handling equipment

Pipe facing and beveling equipment

Preheat equipment

Track rigs and welding tents


Several highly trained and skilled welders deployed at one time

Company may be required to have available:

o Metallurgical engineers/technologists

o Structural inspectors

o Welding inspectors






Service – Prime Contract Pipe Weld Inspection General Description

Ultrasonic testing for welding gang production welds.

X-Ray or radiographic inspection for tie-in welds.

Inspection is done prior to coating the welds.

Service is generally performed by an outside firm specializing in pipe weld inspection, which can be contracted to perform the work directly for Enbridge or subcontracted to a prime pipeline construction contractor.


Mechanized ultrasonic testing equipment with automated pipe scanning capability

Most advanced and reliable Radiograhy equipment available


Level II Radiographers capable of interpreting various weld codes and processes such as ASME, ANSI, API , and AWS






9

Service – Prime Contract Coating the Pipe Welds General Description

Pipeline pipe is usually coated inside and out to prevent corrosion from throughput and ground water, respectfully.

Coating composition varies on what’s being put through the pipe and the adverse environmental conditions the pipe needs to withstand.

Pipeline pipe arrives at the construction site pre-coated and therefore needs to be handled carefully to avoid being damaged.

Welding the pipe together may require stripping away the coating at pipe ends and re-coating the welded joints at the construction site.

It takes very specialized equipment and skilled technicians to perform coating procedures on site.

Joints are typically sandblasted just prior to preheating and coating.


Clean, prime and tape machines

Coat and wrap machines

Pipe preheat equipment is often necessary prior to applying joint coatings


One operator per piece of equipment trained in industrial and construction safety






Service Cathodic Protecting the Pipe General Description

Cathodic protection is a technique to control the corrosion of a metal surface by making it work as a cathode of an electrochemical cell. This is achieved by placing in contact with the metal to be protected another more easily corroded metal to act as the anode of the electrochemical cell.

Cathodic protection systems are most commonly used to protect steel pipe and storage tanks, but also steel pier piles for coastal terminals.

Cathodic protection is an effective method of preventing stress corrosion cracking on steel pipes buried for long periods of time.

Services include pre-installation testing and diagnostic engineering, cathodic protection design, cathodic protection installation, post-installation engineering and pipeline integrity management.

Other required services include installing of the cathodic protection test points.


Specialized cathodic protection equipment

Testing equipment

Anodes, rectifiers, crimps, cable wire, etc.

Utility trucks


Usually two or more persons per inspection job trained in industrial HSE

Sometimes test engineer required





When is this Service Required? During construction and post-construction/maintenance phases.

http://en.wikipedia.org/wiki/Corrosion

http://en.wikipedia.org/wiki/Cathode

http://en.wikipedia.org/wiki/Electrochemical_cell

http://en.wikipedia.org/wiki/Electrochemical_cell

http://en.wikipedia.org/wiki/Steel

http://en.wikipedia.org/wiki/Storage_tank

http://en.wikipedia.org/wiki/Piles

http://en.wikipedia.org/wiki/Stress_corrosion_cracking

10

Service – Prime Contract Positioning the Pipe in the Trench General Description

This is the delicate process of lowering a large length of welded pipe into the trench using a series of side boom dozers synchronized to lay the pipe together at the same time so as not to overly bend the pipe or damage the pipe by dropping it.

The process also needs to be orchestrated properly so that the heavy length of pipe does not pull lifting equipment into the trench on top of the pipe.

Equipment

Side boom dozers.

Roller cradle harnesses.

Personnel

Usually one person per dozer machine trained in industrial HSE






Service – Prime Contract Padding the Pipe General Description

This is the process of using tracked equipment capable of moving along rows of crushed material excavated from trenches to screen and place the material precisely where needed in order to pad the pipe once it is buried below ground.

Two step process involving separate passes of the padding machine.

First pass, before the pipe is placed in the trench, places crushed material in the trench to serve as padding beneath the pipe.

Second pass, after the pipe is placed in the trench, places crushed material over the pipe to serve as padding.

This procedure is deployed to help protect the pipe and its coating as the pipe will be buried beneath the ground throughout its lifetime.


Pipe padding equipment.

Self propelled, remote controlled padding equipment is available to allow operator to control padding operation from different vantage points along the trench.


Usually one person per padding machine trained in industrial HSE






11

Service – Prime Contract Horizontal Drilling General Description

This is the process of boring a whole under a river for the pipe to be pulled through as opposed to laying the pipe in a trench on the river bottom or suspending it over the river crossing using an existing bridge or cable system, or as opposed to tunneling using a tunneling machine.

Horizontal drilling uses horizontal drilling machines that are assisted by pressurized water and vacuum suction in order to pulverize the earth and remove mud and debris.

Horizontal drilling is often done in concert with hydrovac and vac trucks.


Horizontal drilling machines

Hauling equipment

Off road capability may be required

Personnel may include: One to three persons trained in

industrial HSE






Service – Prime Contract Road Boring General Description

This is the service of digging a pit and using the pit to position boring machines horizontally in order to bore a hole through solid earth and rock through which the pipe will travel.

This is done to avoid building the pipeline over hills and avoid having to level hills at additional expense. This is also done to enable the pipeline to cross underneath roads and other infrastructure without disrupting activities carried out on them.

The pipe may be fed from one end or pulled through from the other end when the hole is bored.


Heavy equipment for pit digging

Boring machine

Hauling equipment

Pumps to keep pit free of water

Personnel may include: One to three persons per boring

machine trained in industrial HSE






12

Service Installing Temporary Bridges/Swamp Mats General Description

This is the service of supplying, hauling and installing temporary bridges and platforms across creeks, swamps and bogs to enable heavy equipment to cross or work while mitigating damage to the environment.

Bridge and platforms are usually sectional and made of lightweight, yet strong materials so they don’t sink and can be easily transported to and from remote sites.


Front end loader for placing mats

Flatbed trucks for hauling

Personnel may include: One person trained in heavy

equipment and industrial HSE






Service – Prime Contract Weighting the Pipe General Description

This is the process of installing weights on segments of the pipe that are subject to buoyancy due to being submerged in water, muskeg, silt, loose bottom conditions that cannot otherwise be corrected.

The kind of weights used may vary depending on the design specifications of the pipeline, conditions encountered and environmental considerations.

Pipe weights come in several different type, requiring different procedures for attaching them carefully to the pipe:

o set-on, strap-on sand/gravel filled polypropylene fabric or saddle bags; o bolt-on, clamp-on cement weights; o screw-down steel anchors; o continuous concrete coating (gunnite) for long sections.


Flatbed trucks with boom cranes

Cement casting equipment

Fork lifts


Usually installation crews of four or more persons trained in industrial HSE






13

Service Preparing Mainline Valve Site General Description

Preparing a mainline valve site involves clearing, brushing, grading and compacting the location where the valve is to be installed.

Since valves may be located at remote locations along the pipeline, this could also involve construction of an access road.


Dozers, brushers, graders.

4x4 Trucks for personnel transport

Transport trucks and trailers for hauling equipment


One operator per piece of equipment trained in industrial HSE.






Service Transporting Mainline Valve and Trap Assemblies General Description

Mainline vale and trap assemblies on a major pipeline construction project are usually very heavy and require special heavy hauling techniques to ensure they are shipped and delivered undamaged to the construction site and do not represent a hazard to property owners, pedestrians and motorists while in transit.

For this reason, heavy haul contractors may be required to perform this kind of shipment in conjunction with heavy crane contractors deployed at construction sites to remove the assemblies from their transport cradles when they arrive.


Transport s with heavy haul trailers equipped with cranes

Mobile cranes


One operator per piece of equipment trained in industrial HSE






14

Service Clearing Pump Station Site General Description

This is the process of clearing and removing vegetation and natural obstructions from the surface of the land required for the pump station facility and its various access points.

Clearing methods may include:

o Slashing;

o Logging and salvage;

o Stump removal;

o Mulching;

o Topsoil stripping.

Hauling away debris.


Forestry equipment

Dozers

Mulching machines

Dump trucks

Chain saws


Usually one person per piece of equipment trained in industrial HSE







Supply Aggregate (Sand & Gravel) General Description

Sand and gravel is often required during pipeline mainline, pump station and storage facilities construction to stabilize ground conditions and provide a firm base for the installation of concrete pads and road beds.

Sand may also be required to line pipeline trenches to provide a soft, stable base for buried pipe that will not damage the pipe or its protective coating.

Suppliers should have their own gravel pits with crushing, screening and washing capabilities to meet exact requirements for aggregate size.

Must be capable of supplying single orders of at least 100,000 tons at a time on a short turnaround basis.

Quality

Varies according to pipeline engineering specifications for each application

Technical



N/A

When is this Supply Required? During pre-construction and construction phases.

15

Service Hauling Aggregate General Description

Gravel, sand and aggregate hauling is the transporting of such material from the quarry/supplier to the job site where is to be dumped and eventually used.

Usually involves the use of dump trucks and wagon/trailers with end dump or side dump capability and volume capacities of each unit up to 25 cubic meters.


Dump trucks can range in size in single,

tandem and tri-axle configuration

Wagon trailers can also range in size, up to

25 m3

Each truck requires a skilled operator with

experience working in and around

construction sites


Equipment usually requires a single operator guided from the ground by construction site personnel

Operators require licensing and

appropriate training in industrial

safety






Service Compacting General Description

This is the process of using mobile equipment to drive over or hammer on the ground in order to compact soil or aggregate material into a stronger load bearing surface.

May also involve compacting concrete after it is freshly poured to ensure it contains no air pockets.

Generally required for pump station construction in preparing surfaces for the pouring of concrete slabs.

Services must be transportable to remote sites.


Wide variety of equipment and processes available depending on the size of the job, quality of the surface and/or density of the subsurface required after compaction


One person for each piece of equipment trained in industrial and/or construction safety


Heavy equipment operator ticket

COR





16

Service Performing Civil Work at Pump Station Site General Description

This is the process of developing the land upon which the pump station will be situated and installing the footings, piles, foundations, concrete pads, drainage systems, underground electrical conduits, underground sewage pipes, etc. in preparation for facilities construction.

Civil contractors usually provide this kind of service to exact engineering standards and subcontract out portions to qualified subcontractors, such as pile driving, concrete pouring, excavating, etc.


Wide range of earth moving and hauling equipment, excavators, compactors, material handling equipment


Qualified trades persons, heavy equipment operators and laborers trained in industrial HSE

Civil engineers may be required






Service Pile Driving General Description

This is the process of using heavy hammers to drive piles (steel, wood or concrete poles) deep into soft ground until they achieve appropriate resistance, which in turn serve as support pillars for heavy surface structures that would otherwise sink into the soft ground.

Generally required for pump station construction and bridge emplacements permitting access to pump stations.

Sometimes required for platforms for pipeline suspended crossings.

Must be able to drive piles of varying dimensions under varying geotechnical conditions.

Services must be transportable to remote sites.


All equipment on tracks

Hydraulic impact pile hammers

Diesel impact pile hammers

Air/steam pile hammers

Drop hammers


One or two persons per pile driver trained in industrial and/or construction safety


COR





17

Supply Ready Mix Concrete General Description

Major pipeline construction projects require lots of concrete in liquid form to be available to form into pillars, piles, retaining walls, pads, slabs, pipe weights, walls, etc., which comes either from cement transport trucks or mobile batch plants located somewhere on or near the construction site.

Suppliers need to be qualified in the production of ready mix concrete to exact standards required and have the necessary knowhow to solve problems as they arise due to climate or environmental conditions.

Suppliers must be capable of supplying large orders for ready mix concrete.

Quality

Varies according to engineering specifications for each application

Technical

Varies according to engineering specifications for each application

Minimum Certification if Delivery Included




When is this Supply Required? During construction phase.

Service Pouring Concrete Pads General Description

This is the process of preparing exact forms, with or without rebar reinforcement configurations, and supervising the pouring of ready mix concrete into the forms at precise locations and to precise volume requirements to assure an even pour without air pockets.

This process includes leveling out the concrete pour and smoothing out the surface with leveling and compaction equipment to prevent bubbles from forming that can weaken the hardened concrete.

It also involves supervising the curing process so it doesn’t harden too fast or two slow and knowing when to make adjustments to drying methods.


Trucks for transporting personnel and small amounts of material, equipment and hand tools to and from the construction site


Trades persons and laborers trained in industrial HSE






18

Supply Pumps and Electric Motors General Description

Major pipeline projects require the installation of pumps at various stages along the pipeline to keep the oil or liquid in motion at speeds of about 1 to 6 meters per second.

Pumps are usually housed in permanent facilities referred to as pump stations, which may contain several pumps with electric motors operating in tandem.

The number of pump stations to be installed and location is defined by the topography of the terrain, the type of product being transported, or operational conditions of the network.

Pumps with electric motors are ordered according to horsepower, flow rate, outlet pressure, inlet suction or the number of feet or meters the pump can raise or lower a

column of water at atmospheric pressure.

Most pumps deployed on oil pipelines are centrifugal pumps.

Electric motors can range up to 6,500 hp (or higher where feasible or available).

Quality

Varies according to pipeline facilities engineering specifications for each application

Technical




When is this Supply Required? During pre-construction, construction and post-construction/maintenance phases.

Supply Process Piping General Description

Throughout a major pipeline project there are different operational requirements that require facilities to be constructed to operate in conjunction with the transporting pipe itself, such as storage tank, terminal, separation and or mixing facilities.

These facilities require fabricated piping solutions to meet operating requirements known as process piping and mostly involve specialized welding of exotic materials.

Process piping may require a wide variety of solutions involving pressure piping, manifolds, piping assemblies and elbows consisting of carbon steel, stainless steel or nickel allow materials.

Fabrication of assemblies may be required on facility construction sites or may be preassembled in suppliers’ facilities and transported to site as a supply package to be tied into a larger system depending on the solution required.

Quality


Technical Varies according to pipeline facilities

engineering specifications for each application



When is this Supply Required? During construction and post-construction/maintenance phases.

http://en.wikipedia.org/wiki/Horsepower

http://en.wikipedia.org/wiki/Flow_rate

http://en.wikipedia.org/wiki/Pressure

http://en.wikipedia.org/wiki/Suction

http://en.wikipedia.org/wiki/Atmospheric_pressure

19

Supply Structural Steel General Description

Pipeline facilities requiring process piping solutions, pumps, compressors, etc. often need structural steel configurations to serve as elevated platforms, frames, pillars, etc. to support them and house them during their operation.

Structural steel frame buildings are often required along with external cladding and roofing to protect operational equipment and personnel from the elements in harsh climates.

Enbridge often contracts for process piping and structural steel solutions together in one package with one supplier.

Quality


Technical Varies according to pipeline facilities

engineering specifications for each application



When is this Supply Required? During construction phase.

Service – Prime Contract Installing Station Facilities General Description

General contractors are usually contracted by Enbridge to install injection stations, pump stations, valve stations and delivery stations along a major pipeline system.

General contractors are responsible for assembling the station components according to precisely engineered drawings with some components fabricated in a factory and assembled on site and others fabricated on site.

These contracts usually call for testing of components prior to assembly and after assembly, prior to commissioning.

Installing facilities will usually involve subcontracting out welding, electrical, mechanical and structural activities to subcontractors with specialized skills and procedures.


Assembly equipment, portable power equipment, inspection equipment, etc.


Mostly skilled tradespersons and specialists trained in industrial HSE

Engineers, planners and schedulers






20

Service – Prime Contract Installing Electrical/Electrical Inspection General Description

Major pipeline projects involve the installation of electrical systems with which to power pumps, actuators, controls and control rooms at pump stations and remote electrical systems (some solar systems) to power monitoring and security equipment.

Larger projects will require electrical systems engineering as well as the design and installation of power block and transformer systems.

Smaller projects may only require journeymen electricians.

Enbridge usually contracts this work out through general contractors who in turn sub it out to specialized subcontractors.

Contractors may also be required to provide inspection services.


Utility vehicles

Electrical testing equipment and power tools


Qualified personnel trained in industrial HSE




Satisfactory insurance When is this Service Required? During pre-construction and construction phases.

Service – Prime Contract Installing Mechanical/Mechanical Inspection General Description

Major pipeline and pump station construction projects often involve the installation of mechanical systems of varying size and complexity.

Systems associated with pumps, valves, tanks, blending equipment, etc.

Mechanical systems may also involve mechanical engineering and custom designed pieces to be installed made of exotic metals.

Enbridge usually contracts this work out through general contractors who in turn sub it out to specialized subcontractors.

Contractors may also be required to provide inspection services.


Air compressors, hoses and wrenches

Torque wrenches

Power tools, hydraulic tools

Grease guns, etc.


Qualified personnel trained in industrial HSE






21

Supply Installing Flanges & Fittings General Description

Usually pipes come in tubular form and have to be either welded together or bolted together with the use of welded on flanges.

Sometimes pipe configurations require tight bends or need to split in two directions requiring elbow or T-joints. These joints or “fittings” can be welded or bolted to pipe in either a manufacturing facility or on site.

They can be manufactured in a plant and then either welded on or bolted onto piping systems on site.

Joints have to be hydro tested to make sure the welds and seals are adequate for the job intended.

Quality


Technical





7 Silos

1) Pipeline Construction

2) Pump Station

3) Land Terminal

4) Marine Terminal

5) Tunnels

6) Power Supply

7) Common Services

Activities Associated with Major Pipeline Construction...

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