Pipe fittings
| material | U. S. norms | Chinas norms | Japanese specification | German norms |
| carbon steel | ||||
| A234-WPB | 20 | PG 370 | ||
| 20G | PG 410PS 370PS 410PT 370PT 410 | |||
| A234-WPC | PS 480PT 480 | |||
| A420-WPL6 | PL 380 | TTST 35N/V | ||
| lean alloy steel | ||||
| A234-WP1 | 16M o | PA 12 | 16Mo5 | |
| A234-WP12 | 15CrMo | PA 22 | 14CrMo44 | |
| A234-WP11 | 12Cr1MoV | PA 23 | 14CrMo44 | |
| A234-WP22 | 12Cr2Mo | PA 24 | 10CrMo910 | |
| A234-WP5 | 1Cr5Mo | PA 25 | 12CrMo19.5 | |
| A234-WP9 | PA 26 | |||
| A420-WPL3 | PL 450 | |||
| A420-WPL8 | PL 690 | |||
| stainless steel | ||||
| A403-WP304 | 0Cr19Ni9 | SUS304 | ||
| A403-WP304H | 1Cr18Ni9 | SUS304H | ||
| A403-WP304L | 00Cr19Ni10 | SUS304L | ||
| A403-WP316 | 0Cr17Ni12Mo2 | SUS316 | ||
| A403-WP316H | 1Cr17Ni14Mo2 | SUS316H | ||
| A403-WP316L | 00Cr17Ni14Mo2 | SUS316L | ||
| A403-WP317 | 0Cr19Ni13Mo3 | SUS317 | ||
| A403-WP317L | 0 0 Cr17Ni14Mo3 | SUS317L | ||
| A403-WP321 | 0Cr18Ni 1 0Ti | SUS321 | ||
| A403-WP321H | 1Cr18Ni11Ti | SUS321H | ||
| A403-WP347 | 0Cr19Ni11Nb | SUS347 | ||
| A403-WP347H | 1Cr19Ni11Nb | SUS347H | ||
| A403-WP309 | 0Cr23Ni13 | SUS309 | ||
| A403-WP310 | 0Cr25Ni20 | SUS310 |
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