black steel is a form of non-galvanized steel. the name “black steel” comes due to the appearance of the steel; it has a dark color on the surface of the steel due to iron oxide coating. this steel is important in applications where galvanized steel is not required.bla

standard specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service.this standard is issued under the fixed designation a182/a182m, the number immediately following the designation indic

api 5l/astm a53 gr.b, carbon steel, lsaw steel pipe

api 5l/astm a53 gr.b (hot expanded erw steel pipe

aisi/sae 4130 steel grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 315º c (600º f). it shows good overall combinations of strength, toughness and fatigue strength.size range(mm):

electric resistance welded (erw) pipe is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. the two edges are then simultaneously heated with a high frequency current and squeezed together to

seamles

api 5l/astm a53 gr.b, carbon steel, lsaw steel

api 5l/astm a106 gr.b, seamless carbon steel pipe

ferritic steel is a grade of stainless steel alloy that contains over 12% chromium. it differs from other forms of stainless steel in two critical regards: its molecular grain structure and its chemical composition.ferritic stainless steel is actually defined as a stra

china oil & gas pipeline network corp, the country39;s largest energy infrastructure company, said it has started tunneling through the yangtze river for its china-russia east-route natural gas pipeline on last tuesday, marking new progress in the two countries39; energy cooperation to improv

api 5l/astm a53 gr.b (hot rolled erw steel pipe)outside diameter

api 5l/astm a106 gr.b, seamless carbon steel pipe

threaded coupling ends design (npt or bsp)in case of the threaded coupling, the coupling ends normally in female of npt (national pipe threads) or in male and female bsp (british standard p

welded pipes are manufactured from plate or continues coil or strips. to manufacture a welded pipe, the first plate or coil is rolled in the circular section with the help of a plate bending machine or by a roller in the case of a continues process.once t

api 5l gr.b/astm a53 gr.b (hot expanded erw steel pipe)

api 5l/astm a106 gr.b, seamless carbon steel pipe

api 5l gr.b/astm a53 gr.b, carbon steel, lsaw