S275JR EN10217 EN10210 EN10219 S235 ERW Black Steel Pipe

Outer Diameter114.3mm - 610mm ( 4 " - 24 " ) EN10210 / EN10219 S235 ERW Black Steel Pipe

ERW (Electric Resistance Welded), HFI (High Frequency Induction), HFW (High-Frequency Welding)

Electric Resistance Welded (ERW) Pipes are manufactured from Hot Rolled Coils / Slits. All the incoming coils are verified based on the test certificate received from steel mill for their chemistry and mechanical properties. ERW pipe is cold-formed into a cylindrical shape, not hot-formed. Instead of flame, electric current is used for heating edges of the strip for weld fusion. This welding process does not need any filler metal. Instead, the welding pressure causes some of the metal to be squeezed from the joint, forming a bead of metal on inside and outside of the tube. This bead or welding flash is trimmed or completely removed during the process.

During production, online visual inspection is also carried out for surface defects, diameter accuracy, ovality and weld bead shape. Required sample rings as per specification are cut to carry out mechanical testing of weld and body e.g. flattening test, bend test etc. All pipes are then processed in finishing and testing area for pipe end preparation i.e. Facing/Bevelling followed by hydrostatic pressure testing as per specification.

Individual pipe is then visually inspected for the parameters specified in the specification before offering to the customer's inspection, if any. Data of all tests is re-verified and submitted to the customers.

Quality Standards:

API 5L Line Pipe for oil and gas
BS 1387 Steel Tubes for use for Water, Gas, Air and Steam
GB/T3091 Welded steel pipe for low pressure liquid delivery and construction
GB/T9711 Petroleum and natural gas industries--Steel pipe for pipelines

EN10217 Welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature properties

ASTM A53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

DIN 2458 WELDED STEEL PIPES AND TUBES

Payment Term: T/T, L/C at sight or negotiate

Delivery time: 7 day at fastest, based on total quantity or as customers’ requirements

Supply ability: 50,000 Metric Tons/Month

Loading port: Tianjin(Xingang) Port

Packing: Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.

Our Advantage:

Huayang specialized in manufacturing welded carbon steel pipes for 14 years. The annual output is around 1,000,000 tons. Our products have been exported to 40 countries and regions till now, such as Canada, Hong Kong, Vietnam, Bangladesh, The U.A.E, America, Spain, Italy, Netherlands, Kuwait, Saudi Arabia etc. So any inquiry or special demands will get fast and most professional reply.