Material Carbon steel: ASTM A105,ASTM A350 LF1,LF2,CL1/CL2,Q235A Stainless steel: ASTM A 182, ASTM A240 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 S33, 316L, 317, 317L, 321, 347, 347H, 409, 410, 410S, 420, 430 Alloy steel:ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911 Standard ANSI, ASME, DIN, JIS, EN, GB, BS, GOST Surface Rust-proof oil, Black, Yellow, Galvanized Type plate, weld neck, slip on, threaded, lap joint, socket weld, spectacle, integral, orifice and blind Flange facing Raised face , Flat face, Ring Joint face, etc Size DN10-DN2000, 1/4"~240" Process forged, ring rolled and heat treatment Pressure ANSI: 150# 300# 400# 600# 900# 1500# 2500# DIN:PN1.0 PN2.5 PN6,PN10,PN14,PN25,PN40,PN64,PN100,PN160, PN250,PN320,PN400 JIS:B2220(30K) JIS2238(40K,63K) JIS3451(F15,F12) BS4504: PN6,PN10,PN16,PN25,PN40 EN1092:PN6,PN10,PN16,PN25,PN63,PN100 Connection Welding Technical Forged Package Wooden case,Cartons, Pallets or crates according to buyer's requirements. Certificate ABS,API,ISO9001 Applications Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction Check from website: http://www.steelfittings-flange.com/e_products/?big_id=4