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The steel butt-welding pipe fittings produced by our company are made of high-quality carbon steel (such as WPB, WPL6, 20#, etc.), stainless steel (304/304L, 316/316L, 321/321H,347,347H),duplex Stainless steel (S32205/S31803/S32750/S32760/S31254/S32507,etc.),special materials such as nickel-based alloys, hastelloy, tit...