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· PN-EN 10217-4
Welded steel pipes for pressure purposes – Technical delivery conditions -- Part 4: Electric welded non-alloy steel tubes with specified low temperature properties
The standard specifies the technical delivery conditions for circular electric welded pipes with specified low temperature properties manufactured of non-alloy steels. It specifies the requirements for taking samples and the testing methods.
Circular welded pipes manufactured of non-alloy steel with specified low temperature properties./ from 10,2 to 508 mm /
Steel grades: P215NL and P265NL
Pipe manufacturing stages and delivery conditions:
· Normalized rolled strip, cold forming, welding and weld or pipe normalization
· Hot rolled or normalized strip
cold forming , welding and normalization
cold forming , welding and hot reduction and normalization
cold forming , welding and hot reduction in the temperature adequate to obtain the normalized state
| Mandatory tests | |
| for the TC1 category | for the TC2 category |
| Ladle analysis | |
| Tensile testing of the base material in room temperature | |
| Flattening test or ring testing | |
| Expansion testing on a mandrel bar or ring expansion test | |
| Resilience testing in low temperature /-40 to +20 C degrees/ in accordance with table 5 | |
| Tightness testing | |
| Dimension verification | |
| Non-destructive testing of the weld in order to identify longitudinal defects | Non-destructive testing of the weld and of the pipe body in order to identify longitudinal defects |
| Additional tests: | |
| Check analysis | |
| Tensile testing of the weld in room temperature | |
| Wall thickness measurement at a distance from pipe ends | |
| Non-destructive testing in order to identify transverse defects | |
| Non-destructive testing in order to identify delamination | |
PN-EN 10217-4 Electric welded non-alloy steel tubes Pictures