JIS K 7037:1998 English Edition

Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of the apparent initial circumferential tensile strength

Abstract

This standard specifies six test methods for the determination of the apparent initial tensile strength in the circumferential direction per unit length of glass-reinforced thermosetting plastics (GRP) pipes. The burst test (method A) is suitable for all types and sizes of pipes. It is the reference method. The split disc test (method B) may not be suitable for pipes with helically wound reinforcing layers. The strip test (method C) and the modified strip test (method D) are suitable for pipes with a nominal size of DN 500 and greater. And, it is suitable, when the split disc test is not suitable. The restrained strip test (method E) is suitable for all types of pipes with a nominal size greater than DN 500. The notched plate test (method F) is primarily intended for use for helically wound pipes of nominal size greater then DN 500 with a winding angle other than approximately 90 degree SIGN. Results from one method are not necessarily equal to the results derived from any of the alternative methods.

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