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地下grp管道施工方案(更新版)

  

【正文】 g, twopoint support is remended for 20foot lengths, and threepoint support for 40foot lengths. Support wood should be ensured no nails.● The best way for fittings to be transported is in crates or onto pallets. Direct contact between products during transport must be avoided.Pipe Storage● Do not lay the pipes directly on the ground, rails or concrete floors.● Ensure suitable supports are used for example wooden beams, measuring 10 x 5 cm. To avoid damage to machined pipe ends, stacking should be undertaken with care. The machined ends must be protected for example by polyethylene covered straw mats or polyethylene netting.● If the product is stacked too high for long storage periods (612 months). It is remended that the product is stored under tarpaulins or (white) polyethylene sheeting.● Pipe stacks should have side supports or blocks to prevent rolling or slipping of the stack during stormy weather. A leveled, soft earth surface free of rocks and other hard or sharp objects is remended.9. Arrange Pipe in TrenchPrepare and assemble pipe and joints in accordance with the ISO drawing, using special care to keep joint surface clean and dry.Position pipe on timbers across ditch as shown in figure1. Block into position to hold alignment and prevent lateral movement.Joint the pipe sufficiently in advance of the pipe lowering operation so that no movement of the pipe will take place at location where joints are being cured. Any vibration or movement of uncured or partially cured joints will increase the risk of joint failures.Should be make sure the depth of the trench before lowing the pipe. Figure1With power equipment or manpower, raise the pipe slightly to slide the timber support from under the pipe. Lower the pipe into the trench. Do not drop or lower suddenly. Repeat the above operation at each support. Use rope or webbed sling for lifting pipe. If manpower is used, it is suggested that two men be used for lifting 6inch pipe, and four men and much more be used for the 8inch and bigger pipe.10. Joint lamination Procedure CuttingThis initial step shall be applicable only if a pipe end needs to be cut and replaced, or a pipe length requires field adjustment. Mark the pipe section to be cut using a wraparound and a white marker.Cut the pipe using a hacksaw or a diamond cutting disc, make sure that a proper square cut has been made. Ensure that cut ends remain within the tolerances as show in table .Table : Maximum tolerance on square of cutted pipe endPipe Size RangeTolerance(mm)(mm)(inch)2510014150400616 GrindingGrinding and cleanning the total external surface. Make sure that the pipe ends are grinded as well as the required length as attachment C: Field lamination process sheet.Start the lamination of the fitted sections within two hours after sanding。 wrap joint laminationACWDGAANA4”Butt amp。 WOVEN ROVING: glass reinforcement for joint structure.BONDING MATERIALS STORAGE and USAGE:Details see attachment A: Field Butt amp。 direct sunlight, and should be stored in a dry area and less than 65% humidity in order to avoid surface condensation when used in warmer conditions outside. Lamination on the pipe jointDetails see attachment A: Field Butt amp。 Catalyst StorageResin, WFluid
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