Since October 1st 2007, JPI has abolished paper judging of JWES qualification to convert JPI qualifications. Now, on 13 kinds of JPI qualifications, those who have JWES qualifications (= that is confirmed by JIS qualifications) can obtain automatically JPI qualifications. The 13 kinds of JPI qualifications are A, B, C, D, G, H, CT, HT, CC, DC, HC, CS and DS. The relationship between JPI and JWES qualification is on Table1.
| Welding Process | Designation of JPI Welder Qualification | Designation of JIS Welder Qualification | Test Material | Welding Position | Test Method | Qualification Method |
| Manual Metal Arc Welding | Type A | Class 1 | N‐2F,V.H,O | Carbon Steel(Plate) Thickness:9mm | F.V.H.O | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Class 2 | N-2F,V,H | F.V.H |
| Type B | Class 1 | N‐3F,V,H,O | Carbon Steel(Plate) Thickness:19mm | F.V.H.O | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Class 2 | N-3F.V.H | F.V.H |
| Type C | Class 1 | N-2F,P | Carbon Steel (Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Type D | Class 1 | N-3F,P | Carbon Steel (Pipe) 200A or 250A Thickness: min 20mm | horizontal fixe dvertical fixed | Side Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Type E | Class 1 | - | High Tensile Steel (Plate) minimum Tensile Strength : 570〜610N/mm2 or min.780 N/mm2 | F.V.H.O | Side Bend Test Fracture Test | Welding Test |
| Class 2 | - | F.V.H |
| Type F | Class 1 | - | 2.25Cr-1Mo Steel(Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Welding Test |
| Type G | Class 1 | CN-F,V,H,O or CN-F,V,H,CA-O | Austenitic Stainless Steel(Plate) Thickness: 9mm | F.V.H.O | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Class 2 | F.V.H |
| Type H | Class 1 | CN-P | Austenitic Stainless Steel(Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| TIG Welding | Type CT | Class 1 | T-1F,P | Carbon Steel (Pipe) 100A Sch20 | horizontal fixed vertical fixed | Root Bend Test | Confirmation of JIS Qualification |
| Type FT | Class 1 | - | 2.25Cr-1Mo Steel(Pipe) 50A Sch40 or Outer Diameter: 63.5mm Thickness: 4.0mm | horizontal fixed vertical fixed | Root Bend Test | Welding Test |
| Type HT | Class 1 | TN-F,P | Austenitic Stainless Steel(Pipe) 100A Sch10S | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| TIG and Manual Metal Arc Welding | Type CC | Class 1 | C-2F,P | Carbon Steel (Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Type DC | Class 1 | SC-3F,P | Carbon Steel (Pipe) 200A or 250A Thickness: min 20mm | horizontal fixed vertical fixed | Side Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Type FC | Class 1 | - | 2.25Cr-1Mo Steel(Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Welding Test |
| Type HC | Class 1 | CN-PM | Austenitic Stainless Steel(Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| TIG and MAG Welding | Type CS | Class 1 | SC-2F,P | Carbon Steel (Pipe) 150A Sch80 | horizontal fixed vertical fixed | Face Bend Test Root Bend Test | Confirmation of JIS Qualification |
| Type DS | Class 1 | SC-3F,P | Carbon Steel (Pipe) 200A or 250A Thickness: min 20mm | horizontal fixed vertical fixed | Side Bend Test Root Bend Test | Confirmation of JIS Qualification |
