Petrochina (Halfaya)

HALFAYA PROJECT

SURFACE FACILITY

PHASE THREE

DETAIL DESIGN DOC.NO.: HFY3-3125-CIV-SPC-0008 REV.: 0 PAGE 2 OF 6

CONTENT

1.0  SCOPE ........................................................................................................................ 3 

2.0  CODES, REGULATIONS AND STANDARDS ........................................................... 3 

3.0  MATERIALS ............................................................................................................... 3 

4.0  CONSTRUCTION ....................................................................................................... 5 

5.0  CLEAN-UP AND RESTORATION .............................................................................. 6 

6.0  GUARANTEE.............................................................................................................. 6 

Petrochina (Halfaya)

HALFAYA PROJECT

SURFACE FACILITY

PHASE THREE

DETAIL DESIGN DOC.NO.: HFY3-3125-CIV-SPC-0008 REV.: 0 PAGE 3 OF 6

1.0 SCOPE

This specification shall cover the minimum requirements for materials and construction of fencing work.

2.0 CODES, REGULATIONS AND STANDARDS

2.1 Contractor shall meet or exceed the requirements of the latest edition of the following codes, regulations and standards, except as superseded herein. In cases where more than one code, regulation or standard apply to the same condition, the most stringent shall be followed. In the event of a conflict between this specification and other specifications or correspondence, the COMPANY shall be consulted and a ruling, in writing, shall be obtained before any work is started.

ACI 304 Recommended Practice for Measuring, Mixing, Transporting and Placing Concrete

ASTM A121 Zinc Coated (Galvanized) Steel Barbed Wire

ASTM A123 Zinc (Hot-Galvanized) Coatings on Products Fabricated from Rolled, Pressed and Forged Steel Shapes, Plates, Bars and Strip

ASTM A153 Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A392 Zinc Coated Steel Chain-Link Fence Fabric

Codes, Regulations and Statutes of Authorities having jurisdiction in the location of installation

2.2 Some requirements in this specification may be modified by specific requirements in the purchase specification. In case of conflict, the specific requirements supersede this specification.

2.3 Any deviation from this specification must be approved, in writing, by COMPANY. Such written approval must be obtained prior to the commencement of any work which would constitute such a deviation.

3.0 MATERIALS

3.1 All metal components, including fence fabric, posts, top rails, couplings, extension arms, truss rods, stretcher bars, nuts, bolts, tie-wire, bands and fittings shall be hot-dip galvanized or aluminum coated steel or iron conforming to standard ASTM specifications for commercial grade coated ferrous products. Steel posts, top rails and truss pipes shall be equal to ASTM Grade 120, Schedule 40 materials. Referenced dimensions for pipe shall apply to the nominal pipe size not the actual O.D. dimension. Gauge numbers

Petrochina (Halfaya)

HALFAYA PROJECT

SURFACE FACILITY

PHASE THREE

DETAIL DESIGN DOC.NO.: HFY3-3125-CIV-SPC-0008 REV.: 0 PAGE 4 OF 6

applying to size of wire are in reference to W and M, American Standard Wire or Roebling Wire Gauges.

3.2 Fabric shall be chain-link type, 1800 mm high, 50 mm mesh, woven with No. 9 gauge wire. Top and bottom selvage shall have twisted and barbed finish.

3.3 Pipe for top rail and truss rods shall be galvanized 30 mm pipe. End, corner, angle and pull posts shall be galvanized 80 mm pipe size. Gate posts shall be sized as described in Section 3.8. Line posts shall be galvanized 40 mm pipe.

3.4 Fittings and coupling shall be galvanized malleable iron or pressed steel sized for the companion piece. Support arms for 3 strands of barbed wire on top of fence shall be 45 degree type, made to seal the top of line posts with an opening for the top rail.

3.5 Barbed wire shall be twisted pair of No. 12 gauge aluminum coated wire with a 4 point pattern No. 14 gauge wire barbs on 125 mm centers.

3.6 Tie wires shall be No. 9 gauge soft annealed aluminum coated steel and bottom tension wire shall be No. 6 gauge aluminum coated high carbon steel wire attached to the fence on 600 mm centers with hog rings or tie wires.

3.7 Stretcher bars shall be 6 mm x 20 mm galvanized mild steel. Bars shall be threaded through fence and secured to termination posts with 5 bands 25 mm wide clamped with 10 mm diameter bolts.

3.8 Double swing gates shall be of same height as fence and faced with fabric. Frame shall be made with galvanized 50 mm pipe. End pieces shall extend vertically to provide support for barbed wire. Corner braces shall be 90 degree or tee type slip-on fittings with gussets and drilled in two places on each extension for fastening to pipe with 10 mm through bolts. Each gate shall have a 12 mm diameter galvanized steel truss rod with turnbuckle extending diagonally from upper hinged corner to lower center corner. The end fixture for the truss may be either the gusset or an auxiliary fitting. The fabric shall be fastened to the frame with tie-wires and stretcher bars as for the fence. Barbed wire shall terminate at bands surrounding the risers. The risers shall be sealed with weather caps.

3.9 The gate hinges shall be galvanized malleable iron and designed so that the gate cannot be lifted off the hinges. The gates shall include a plunger type latch made with 30 mm pipe and be complete with flush plate, anchors and keepers to secure the gate in an open or closed position. The latch shall include a heavy duty fitting for pad-locking the gate in the closed position. Drive gates will be equipped with automatic hooking device to retain gate in the fully opened position. Gate posts shall be galvanized pipe and shall be sized as follows:

Gate Opening (mm) Pipe Size (mm)

Nominal THK. (mm) Single Double

To 1800 To 3600 80 5 1800 to 4000 3600 to 6000 100 6

6000 to 8000 120 6.35

Petrochina (Halfaya)

HALFAYA PROJECT

SURFACE FACILITY

PHASE THREE

DETAIL DESIGN DOC.NO.: HFY3-3125-CIV-SPC-0008 REV.: 0 PAGE 5 OF 6

3.10 Concrete for setting posts and anchors shall be made with Type ⅱ or Type ⅴ Portland cement mixed as a 1:2:4 concrete or 17 MPa at 28 days.

4.0 CONSTRUCTION

4.1 Contractor shall supply and install an 1800 mm high chain link fence with 50 mm mesh. Single walkway gates and double drive gates shall be provided as required. Three strands outward sloping barbed wire shall be used at the top of fence. Generally, fences shall be located 300 mm inside the property lines and enclose the entire titled property.

4.2 All work shall be performed by skilled and experienced fence erectors on lines and grades shown on the construction drawings.

4.3 Posts shall be set vertically plumb in concrete foundations a minimum of 225 mm in diameter and to a minimum depth of 900 mm for line posts and 1000 mm for corner and gate posts. Gate and corner posts to have a 300 mm diameter foundation. Line posts shall be spaced on approximately 3000 mm centers. Concrete shall extend approximately 25 mm above grade and shall have a sloped top to assure drain-off of water. Corner posts shall be braced in each direction with a snug fitting 30 mm galvanized pipe extending from near the top of the corner post to near the bottom of the first adjacent line post. End posts shall be braced in a similar manner in one direction.

4.4 Fence shall be spliced where necessary for installation as a continuous run between corners, angles or end terminations. Fabric shall be pulled taut by the use of at least 3 tensioners when installing stretcher bars. Tautness of the fencing shall be sufficient to produce positive tension without distortion of the mesh. Fence shall clear grade by approximately 25 mm.

4.5 Top rail shall be installed in random lengths of 6000 mm. Slip coupling at least 175 mm long shall be used to connect rails. Provision for expansion of the rail shall be provided by allowing an end clearance of approximately 10 mm per 30 meters. Top rail shall pass through base of line post extension arms and shall be securely fastened to angle or end posts with rail cups.

4.6 Fence shall be attached to top rails with aluminum coated steel wire ties spaced 600 mm apart and to line posts with ties spaced no more than 350 mm apart. Top barbs of fence shall extend 25 mm above top of rail.

4.7 Extension arms for the barbed wire shall extend outward from the property line or outward from an enclosed tank area. The arms shall be of such length that the top wire will be 300 mm from the fabric. Wire over gates shall be aligned vertically with the wire on the fencing extension arms. All wire shall terminate at bands strapped to the termination posts. Wires shall be pulled tight to remove all slack and provide a positive tensile force. Splices shall be made in a neat manner to maximize symmetry of the run.

4.8 Electrical Grounding

Petrochina (Halfaya)

HALFAYA PROJECT

SURFACE FACILITY

PHASE THREE

DETAIL DESIGN DOC.NO.: HFY3-3125-CIV-SPC-0008 REV.: 0 PAGE 6 OF 6

All gate posts and barbed wire terminations at gate posts shall be grounded by the installation of #2 green insulated conductors attached to 2400 mm long, 20 mm diameter driven ground rod. Ground rod shall be installed in a minimum of 200 mm diameter tile ground well enclosure to allow access to the ground wire attachments. Posts and barbed wire shall be bonded by approved electrical bonding attachments.

5.0 CLEAN-UP AND RESTORATION

5.1 Upon completion of the Work, Contractor shall clean up and remove all loose material and debris from the job site and dispose of it as waste material as directed by COMPANY.

5.2 Before leaving the job site, Contractor shall ensure that all existing structures, roadways and graded areas are returned to a condition satisfactory to COMPANY and at least equal to that which existed before the Work commenced.

6.0 GUARANTEE

Contractor shall guarantee the Work against defective materials, poor workmanship and improper construction for a period one year after the plant has been in regular operation, the total period not to exceed eighteen months from the date of completed construction. Contractor shall repair or make good, at his own expense, any defects noted during the guarantee period.