| VALQUA No. | Application | Cross Section |
| 550 | Gasket for piping flange, pressure vessel, valve bonnet, etc. |  |
| Dimensional standards |
| Dimensions specified in JPI, ASME, API, MSS and the like for ring joint flanges are our standard. |
| Name | Max. Hardness（HB） |
| Low carbon steel | 120 |
| Pure iron | 90 |
| Copper | 60 |
| SUS304 | 160 |
| SUS304L | 150 |
| SUS310S | 160 |
| SUS316 | 160 |
| SUS316L | 150 |
| SUS321 | 160 |
| SUS347 | 160 |
| SUS430 | 170 |
| 5Cr-0.5Mo steel | 130 |
| Monel metal | 140 |
| Titanium | 140 |
| Aluminum | 40 |
| Nickel | 120 |