28 .6mm. 0.049. X. 1 1/4 ASTM B668 UNS N08028 Alloy 28 Seamless Pipe China Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube ASTM B668 / ASME SB668 Standard Specification for UNS N08028 and N08029 Seamless Pipe and Tube ASTM B677 / ASME SB677 Standard Specification for UNS En 10 China Pipe Fittings, Steel Flanges, Steel Pipes Manufacturer Hot Steel Pipes Manufacturer, Pipe Fittings Manufacturer, Flanges Manufacturer, China Valves Manufacturer +86-18267732328. Get in touch with us. [email protected] ASTM B668 UNS N08028 Alloy 28 Seamless Pipe China Alloy Steel Pipes .