Different test for API 5L line pipe

API 5L steel pipe would be applied among the areas of fluid transportation steel pipe-preferred in long pipelines due to inexpensiveness, oil and gas. No matter which kind of industry needs it, we should make different test for seamless or ERW steel pipe before the purchase.

Here is the main types of the test for API 5L line pipe:

Hydrostatic test: This test would give guarantee for leakage problem from testing the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested.

Bend test: No cracks shall occur in any portion of the test piece and no opening of the weld shall occur.

Flattening test: Acceptance criteria for flattening test shall be:

EW pipes D<12.750 in:

X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall, 50%.

For pipe with a D/t > 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original outside diameter.

For other sizes refer to the full API 5L specification.