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Activities of JWES

II. Certification Activities

1.Certification of welders Classification Certification standard Numbers
Arc welding JIS Z 3801,
WES 8201
Semi-automatic welding JIS Z 3841,
WES 8241
Stainless steel welding JIS Z 3821,
WES 8221
Titanium welding JIS Z 3805,
WES 8205
Plastic welding JIS Z 3831,
WES 8231
Silver alloy brazing JIS Z 3891,
WES 8291
Fillet welding WES 8101 13
Foundation piles WES 8106 367
Petroleum Industry(JPI) JPI-7S-31,
WES 8102
(as of April 2018)
2.Certification of welding coordination personnel Classification Certification standard Numbers
Senior welding engineer JIS Z 3410 /
ISO 14731,
WES 8103
Welding engineer 8,231
Associate welding engineer 25,821
Welding practitioner WES 8107 1,406
(as of March 2018)
3.Certification of robot operator for steel framed building welding Classification Certification standard Numbers
Multi-articular robot WES 8110, 8111 1,079
(as of February 2018)
4. Certification of micro-soldering (MS) specialists Classification Certification standard Numbers
MS engineer WES 8109 215
MS instructor 583
MS Process control Engineer 54
MS Assembly Process Engineer 9
MS inspector 611
MS operator of 1st class JIS Z 3851 1,690
MS operator of 2nd class 348
(as of April 2018)
5. Certification of technical grade of corporations for non-destructive inspection and inspection personnel Technical grade of corporation Certification standard Numbers
Grade A WES 8701 17
Grade B 9
Grade C 31
Grade D 60
Inspection Companies Qualified for Architectures and Steel Frames 65
Classification of engineer Certification standard Certified numbers
Inspection coordination personnel WES 8701 492
Senior inspector 1,563
Inspector 1,924
(as of April 2018)
6. Certification of products Classification of enterprise Certification standard Certified numbers
a) Steel products
Weldable high strength steel plates WES 3001 68
Evaluation criterion of rolled steels for low temperature application WES 3003 72
Supplementary requirements High strength steel plates with low susceptibility to cold cracking WES 3009 21
(as of April 2018)
b) Certification of welding and cutting equipment
Manual blowpipes for cutting JIS B6801,
JIS B6805
Manual blowpipes for welding 3
Pressure regulator for welding, cutting and allied processes JIS B6803,
JIS B6805
(as of April 2018)
7. Certification of welders and welding procedures in accordance with law Classification Law and standard Numbers
Certification of welders Electric business law 1,413
commercial nuclear power plants 1,315
Regulatory law of nuclear reactors and radioactive wastes 250
Classification Law and standard Certified numbers
Certification of welding procedures Electric business law 114
commercial nuclear power plants 101
Regulatory law of nuclear reactors and radioactive wastes 42
(as of April 2018)
Certification of suitability of new welding technology Electric business law 1
(as of April 2018)
8. Certification of international welding engineers Classification Diploma earned engineers
IWE(International Welding Engineer) 1,073
IWT(International Welding Technologist) 430
IWS(International Welding Specialist) 660
IWP(International Welding Practitioner) 315
IWIP(International Welding Inspection Personnel) 128
(as of March 2018)