CONTROL DE CALIDAD
AOP, AGCO, APCO, Alco, ALCO HI-TEK, Balon, Bray, Bonney Forge, Crane , Cameron , Center Line, Daniel, Demco, DHV, DSI, Edwards, Fairbanks, Flowseal, Flomatic, Flow-tek, Foster, FMC, KF, KF Eagle, Keystone, HEX, Jamesbury, Grove, MTS, Newco, Nibco, NOSHOK, Norris, Norriseal, Nutron, Master Flo, Mueller, M&J, Posi-Seal, Powell, PBV, Quadrant, Smith, Swagelok, Valmatic, Velan, Vogt, Tom Wheatley, TK, Walworth, Warren, WKM, Wheatley, Neway, Valvitalia, International Standard Valve (ISV), Neway, Arflu, YDF
Anvil, Awaji Materia Co. Ltd, Benkan Japan KK, Bonney Forge, Cintolo Hnos Metalúrgica ( Curvo-Sold), Cifunsa, Close Bend, Erne Fittings, Galperti, Hackney Ladish, Flo Mac Inc., Flowline, Furmanite, Gulf Manufacturing, Metalfar, Mega, Raccordi Forgiati, SK Bend, Talyor Forge, Riga Tenaris, Tube Forgings Of America, Inc. (TFA), TK Corporation, TD Williamson, Ulma, Welbend, Wilhelm Schulz, Tectubi Raccordi S.p.A, Raccordi, WFI International, Phoenix Capitol, Valvitalia (Tecnoforge) Balkrishna, CHW Forge, Charm Ming, Arah Dagang, Good Luck Engineering, Bothwell, Pakrash, Norma, Pantech Steel, R.D. Forge, R.N. Gupta, Sungkwang Bend, Tru Flow, Steel Shape, San Eng, Santafede, Tirupati Fab, Tae Kwang Bend, Triveni, Uma Shanker, Jai Auto, Tung Fong, Chandan, Hilton, Mills Iron Works
Swagelok, Superlok, Fitok, Ham-let, Comfit, Unilok
Pikotek
Flexitallic (USA), Lamons (USA), Garlock (USA), Carrara (Italy), Wolar (USA)
Ashcroft, Noshok, Wika
Asco, Versa
Swagelok, Handy Harman, Rath Gibson, Ham-Let, Comfit, Fitok, Abac Srl
Bebitz, Bonney Forge, Boltex, Buffalo Flanges Inc., Coffer, Dl Flange, Echjay Industries, Erne, Federal Flange, Forged Components Inc., Francovigh, Galperti, Gulf Manufacturing, Hacney Ladish, Kerkau Manufacturing, Maass Flange, Melesi, Metalfar, Tri-Lad Canada, Ulma, TD Williamson, Texas Flange, Viraj Profile Limited, WFI International, Welbend, Balkrishna, CHW Forge, Charm Ming, Arah Dagang, Good Luck Engineering, Bothwell, Pakrash, Norma, Pantech Steel, R.D. Forge, R.N. Gupta, Sungkwang Bend, Tru Flow, Steel Shape, San Eng, Santafede, Tirupati Fab, Tae Kwang Bend, Triveni, Uma Shanker, Jai Auto, Tung Fong, Chandan, Hilton, Manusin
Swagelok, Anderson Greenwood, Rosemount, Hex Valve, Siemens
Arcelor Mittal, Baosteel Group Corporation, Benteler Steel, Byelorussian Steel Works, Dongbu Steel, Hengyang Valin Steel Tube, Huta Batory, Iljin Steel, Hebei Litonglian, Interpipe, JFE Steel Corporation, JSW Steel USA Inc., Miju Steel Mfg Co., Ltd, Nexteel, Nippon Steel & Sumitomo Metal Corporation, Nicopol, OJSC Dnepropetrovsk Tube Works, Salzgitter Mannesmann, Seah Steel Corp., Shandong Molong, Stupp Corporation, Tenaris, Tex Tube, TMK Koppel, TPCO, Trinecke Zelezarny Moravia Steel, Tubos Reunidos Industrial, US Steel, Vallourec & Mannesmann do Brasil, Vallourec & Sumitomo, Válcovny Trub Chomutov, Voestalpine, Zeleziarne Podbrezova, Wuxi Seamless Oil Pipe
Alloy & Stainless Fasteners, American Screw, Dan-Loc, Fasteners USA, Highland Threads Inc., Hubbell Power Systems, Infasco, Lamons, Metallics, Standard Fasteners, Texas Flange, Texas Bolt & Nut Co
AK Steel, Nucor, SSAB, JSW Steel USA Inc, Ilyich Iron & Steel Works, Usiminas, Arcelor Mittal, Posco, Corus, Hyundai Steel, JFE Steel Corporation
Arcelor Mittal, Baosteel Group Corporation, Benteler Steel, Byelorussian Steel Works, Dongbu Steel, Hengyang Valin Steel Tube, Huta Batory, Iljin Steel, Hebei Litonglian, Interpipe, Jfe Steel Corporation, Jsw Steel Usa Inc., Miju Steel Mfg Co., Ltd, Nexteel, Nippon Steel, Sumitomo Metal Corporation, Nicopol, Ojsc Dnepropetrovsk Tube Works, Salzgitter Mannesmann, Seah Steel Corp., Shandong Molong, Stupp Corporation, Tenaris, Tex Tube, Tmk Koppel, Tpco, Trinecke Zelezarny Moravia Steel, Tubos Reunidos Industrial, Us Steel, Vallourec, Mannesmann Do Brasil, Vallourec, Sumitomo, Válcovny Trub Chomutov, Voestalpine, Zeleziarne
Arcelormittal, Baoshan Iron & Steel Co., Ltd. (BAOSTEEL), Hengyang Valin Steel Tube Co. Ltd.,Interpipe, JFE Steel Corporation, Nippon Steel & Sumitomo Metal Corporation, Shandong Molong Petroleum Machinery, Tejas Casing Ltd., Tenaris, Tianjin Pipe Group Corporation (TPCO), TMK, TianJin DeHua Petroleum Equipment Manufacturing Co., Ltd. (TTGM), JINGJANG SPECIAL STEEL CO. LTO, DALIPAL PIPE COMPANY, United States Steel, Vallourec Tubos do Brasil S.A., Vallourec & Sumitomo Tubos do Brasil (VSB), Wuxi Seamless Oil Pipe Co., Ltd., Jiangsu Changbao
Swagelok, Handy Harman, Sandvik, Rath Gibson, Ham-Let, Comfit, Abac Srl