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1 Scope
This standard specifies the minimum technical requirements of extrusion on polyethylene coating by buried steel pipeline. This standard is applicable to the design, production as well as construction acceptance for the extrusion on polyethylene coating by buried steel pipeline. The extrusion of crossover pipeline on polyethylene coating may be implemented as a reference.
The extruding polyethylene coating may be divided into the normal temperature type (N) for long term work with the highest temperature not more than 50℃ and high temperature type (H) for long term work with the highest temperature not more than 70℃.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent corrections to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to these specifications.
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