GB/T 29460-2012Safey assessment for electrofusion joint of polyethylene pipes containing defects (English PDF)
含缺陷聚乙烯管道电熔接头安全评定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2012
Implementation date
July 1, 2013
Scope
GB/T 29460-2012 is the English-translated version of 含缺陷聚乙烯管道电熔接头安全评定.
GB/T 29460-2012 is the Chinese standard "Safey assessment for electrofusion joint of polyethylene pipes containing defects". Its scope clause reads: This standard specifies the terms and definitions of safety assessment of defective polyethylene pipe fused joints, symbols, general requirements, characterization of defects and Safety assessment.
This standard applies to polyethylene pipe with electric fused pipe fittings connected with defective polyethylene pipe fused joint. Its clauses include normative reference documents; terms and definitions.
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Document preview — GB/T 29460-2012
National Standard of the People's Republic of China
- ICS
- 25.160.40
- Classification
- J 33
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 normative reference documents
- 3 terms and definitions
- 3.1 Defect characterization
- 3.2 Defect calculation size
- 3.3 Fused surface defect
- 3.4 Cold welding
- 3.5 Fusion surface
- 3.6 Hole
1 Scope
This standard specifies the terms and definitions of safety assessment of defective polyethylene pipe fused joints, symbols, general requirements, characterization of defects and
Safety assessment.
This standard applies to polyethylene pipe with electric fused pipe fittings connected with defective polyethylene pipe fused joint.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
Gas - buried polyethylene (PE) piping systems - Part 1. Tubing GB/T Gas - buried polyethylene (PE) piping systems - Part 2. Fittings GB/T GB/T 19808 Tensile peel test for polyethylene frit assemblies with nominal outer diameter greater than or equal to 90 mm for plastic pipes and fittings
3 terms and definitions
GB/T 19808 and GB 15558.2 and the following terms and definitions apply to this document.
3.1 Defect characterization
The rules of the actual shape and size of the irregular rules into a simple geometry of the defects.
3.2 Defect calculation size
After the regularized defect size.
3.3 Fused surface defect
Appears in the fusion interface, that is, the inner wall of the pipe and the pipe wall of the fusion surface defects. Fused surface defects include cold welding and fusion surfaces
Such as the inclusion of such defects are area-type defects.
3.4 Cold welding
Due to the lack of welding input heat makes the fusible link in the pipe and pipe interface on the molecules failed to spread tangled or fully diffuse tangled
Resulting in deficiencies of insufficient strength.
3.5 Fusion surface
After welding residue in the fusion interface on the oil, dust and other debris.
3.6 Hole
In the welding interface or near the welding interface of the hole. This type of defect is a volume defect.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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