Table 1
Qualitative results of hydrogen influence on four piping materials under different pressures and hydrogen concentrations [66, 68].
| Pressure/bar g | Materials | H = <2 Vol.% | H = <5 Vol.% | H = <10 Vol.% | H = <100 Vol.% |
|---|---|---|---|---|---|
| <5.0 | Steel | No effect expected | No effect expected | No effect expected | No effect expected |
| H :Up to 20 Vol.% | |||||
| <5.0 | Stainless Steel | No effect expected | No effect expected | No effect expected | No effect expected |
| <5.0 | Copper alloys | No effect expected | No effect expected | No effect expected | No short term effect expected |
| <5.0 | Polyethylene | No effect expected | No effect expected | No effect expected | No effect expected |
| <8.0 | Steel | No effect expected | No effect expected | No effect expected | No short term effect expected |
| <8.0 | Stainless Steel | No effect expected | No effect expected | No effect expected | No short term effect expected |
| <8.0 | Copper alloys | No effect expected | No short term effect expected | No short term effect expected | No short term effect expected |
| <8.0 | Polyethylene | No effect expected | No effect expected | No effect expected | No effect expected |
| <10.0 | Steel | No effect expected | No effect expected | No effect expected | Unknown |
| <10.0 | Stainless Steel | No effect expected | No effect expected | No effect expected | Unknown |
| <10.0 | Copper alloys | No effect expected | Unknown | Unknown | Unknown |
| <10.0 | Polyethylene | No effect expected | Unknown | Unknown | Unknown |
| <60.0 | Steel | Unknown | Unknown | Unknown | Unknown |
| <60.0 | Stainless Steel | Unknown | Unknown | Unknown | Unknown |
| <60.0 | Copper alloys | Unknown | Unknown | Unknown | Unknown |
| <60.0 | Polyethylene | Unknown | Unknown | Unknown | Unknown |
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