CSWIP Plastics Welder Approval Practice Questions - CSWIP Plastics Welder Approval (TWI BS EN 13067) Exam

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According to DVS 2207-1 guidelines for polyethylene butt fusion, what Melt Flow Rate (MFR) criteria must be met to weld two different PE pipes together without special qualification testing?

Their MFR 190/5 values must both fall within the compatible range of 0.2 to 1.0 g/10 min. Their MFR values must be identical to within ±0.01 g/10 min. One pipe must have an MFR ten times greater than the other to ensure joint flow. MFR compatibility is irrelevant as long as pipe wall thicknesses match.

Correct Answer:

Their MFR 190/5 values must both fall within the compatible range of 0.2 to 1.0 g/10 min.

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