1.1 This test method covers the in-field preparation and testing of tensile test samples that may be used to provide an indication of the tensile performance of butt-fused medium-density polyethylene (MDPE) and high-density polyethylene (HDPE) joints relative to unfused material from the same pipe. This test method is applicable for testing butt-fused joints in pipes of 2.37 in. OD (60.3 mm) and larger with a maximum wall thickness of 2.5 in. (63.5 mm). 1.2 No numerical results are determined by this test method. The result is a either a passing or failing result. Failing results should be investigated and the cause(s) corrected, especially if brittle rupture occurs within the joint-reduced section. This test method may or may not correlate to other test methods for the assessment of the quality of a butt-fusion joint. 1.3 This test method is intended for in-field evaluation of butt fusions made from pipes of the same outside diameter and same wall thickness from polyethylene (PE) compounds of the same Specification D3350 cell classification. The intent of the test method is to create a test coupon that allows for a direct comparison of the strength of the butt-fusion joint with the strength of the pipe regardless of potentially widely ranging ambient temperature conditions. 1.4 This test method may be adapted to evaluate butt fusions made from pipes with different outside diameters, different wall thicknesses, or PE compounds from differing Specification D3350 cell classifications. However, when applied to these situations, the pass/fail criteria established in this test method may not apply. 1.5 Units--The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywordsquality assurance; destructive testing; in-field test; field test; tensile test; butt-fusion; fusion; heat fusion; joint quality
It is common to conduct field qualification testing on butt-fusion operations as quality assurance of the proper function of equipment, proper skill of the fusion operator, and proper conditions for the operation of the fusion equipment. A variety of rudimentary tests (fusion bend-back and others) are used for this assessment currently, which are often highly subjective.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development