General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 6671-2001
Scope
This standard specifies two test methods for determining the longitudinal shrinkage of thermoplastic pipes, one in liquid (method A) and the other in air (method B). This standard applies to all thermoplastic pipes with smooth inner and outer walls and constant cross-section.
GB/T 6671-2001 history
2001GB/T 6671-2001 Thermoplastics pipes-Determination of longitudinal reversion