wholesale Galvanized Steel Pipe Product Specification (For both black and Galvanized Pipes): BS1387 erw galvanized steel pipe Supplied in Self Colour, Red, Black or Galvanised condition. Available in Light, Medium and Heavy gauges. A welded tube used in low-pressure applications, fabrications, sprinkler systems, balustrades and fluid conveyanc. A British standard known as BS 1387 class B galvanized steel pipe applies to welded black pipes that screw onto BS21 pipe threads. With 20% elongation at break, the minimum yield strength is 195 MPa, while the minimum tensile strength ranges from 320 MPa to 460 MPa. Chemical composition and mechanical properties at room temperature Chemical composition (Ladle)Mechanical properties at room temperature C Max.Mn Max.P Max.S Max.Tensile Strength, RmYield Strength, Re (min.)Elongation on Gauge Length L0 = 5.65 S0 A (min.) %%%%N/mm2N/mm2% 0.21.20.0450.045320 to 46019520 Outside DiameterWall Thickness INCHDNmmmm 1/2"1520-21.30.95-2.77 3/4"2025-26.91.1-2.87 1"2532-33.71.1-4 1-1/4"3240-42.41.1-4 1-1/2"4047-48.31.5-7 2"5058-60.31.8-7 2-1/2"6573-76.12.0-7 3"8087-88.92.2-8 4"100113-114.32.2-9 5"125140-141.32.5-10 6"150165-168.32.5-10 8"200216-219.12.75-12 Strict Quality Control 1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random. 2) National accredited laboratory with CNAS certificates 3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV. 4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates. Packingwholesale Galvanized Steel Pipe website:http://www.youfaconstruction.com/carbon-steel-pipe/galvanized-steel-pipe/