Main Butt-Weld Fitting Standards
American (Oil & Gas Dominant)
·Process Fittings: ASME B16.9Short Radius Elbows: ASME B16.28
·Induction Bends: ASME B16.49
·High Yield / Pipeline: MSS SP-75
·Stainless / Thin Wall: MSS SP-43
·Water Works: AWWA C208
European (DIN / EN)
·Current Standard: EN 10253-1, EN 10253-2, EN 10253-3/4
·German: DIN 2605 (Elbows), DIN 2615 (Tees), DIN 2616 (Reducers), DIN 2617 (Caps)
·British: BS 1640 , BS 1965
Russian / GOST (CIS Market)
·Seamless Elbows: GOST 17375 , GOST 30753
·Tees: GOST 17376
·Reducers: GOST 17378
·Caps: GOST 17379
·Welded Fittings: OST 34.10.xxx / OST 36.xx Series
Asian & Oceanian
·Japan: JIS B2311, JIS B2312, JIS B2313
·Korea: KS B 1522, KS B 1541
·Australia: AS 1640
Specialized
·Offshore Piping: EEMUA 234, EEMUA 146
·Hydraulic: SAE J514
Chinese
·GB/T 12459 , GB/T 13401
·SH/T 3408, SH/T 3409
·SY/T 0609
·HG/T 21635 , HG/T 21631
·GD 87, GD 2000
·GB/T 10752
Main Butt-Weld Fitting Material
Carbon & Low Temperature Steel
·Carbon Steel: ASTM A234 WPB, WPC
·Low Temp. Carbon Steel (LTCS): ASTM A420 WPL6, WPL3
High Yield Pipeline Steel
·MSS SP-75 / ASTM A860: WPHY 42, WPHY 46, WPHY 52, WPHY 56, WPHY 60, WPHY 65, WPHY 70 (Typically matches API 5L X-grades)
Alloy Steel (High Temperature)
·ASTM A234: WP1, WP5, WP9, WP11 (Cl.1 & 2), WP12, WP22, WP91, WP92
·European / DIN Standard: 16Mo3, 13CrMo4-5, 10CrMo9-10, X10CrMoVNb9-1
Stainless Steel
·Standard: ASTM A403 WP304/WP304L, WP316/WP316L
·High Temp: ASTM A403 WP321/WP321H, WP347/WP347H, WP310S
·Corrosion Resistant: ASTM A403 WP317L, WP904L
Duplex & Super Duplex Steel
·Duplex: ASTM A815 UNS S31803 / S32205 (Duplex 2205)
·Super Duplex: ASTM A815 UNS S32750 (2507), UNS S32760 (Zeron 100)
Nickel Alloys & Non-Ferrous
·Nickel 200/201: ASTM B366 UNS N02200 / N02201 (WPN / WPN-L)
·Monel 400: ASTM B366 UNS N04400 (WPNC)
·Inconel 600 / 625: ASTM B366 UNS N06600 (WPNCI) / N06625 (WPNCMC)
·Incoloy 800 / 800H / 825: ASTM B366 UNS N08800 (WPNIC) / N08810 / N08825 (WPNICMC)
·Hastelloy C276: ASTM B366 UNS N10276 (WPHC276)
·Copper-Nickel (Cu-Ni): EEMUA 146 / DIN 86088 (90/10 C70600), 70/30 (C71500)
·Titanium: ASTM B363 Gr.2 (WPT2), Gr.5 (WPT5)
·Aluminium: ASTM B361 1050, 5083, 6061