ERW Steel Pipes

We offer erw steel pipeserw carbon steel pipes.
Usage: used for low pressure liquid delivery, such as water, gas, and oil.
process:
erw (electric resistance welded)
hfi (high frequency induction)
efw(electric fusion welded tube)
hfw(high-frequency welding)
quality standard:
erw hfi , efw,:
gbt3091 welded steel pipe for low pressure liquid delivery
gbt9711 petroleum and natural gas industries--steel pipe for pipelines
is: 3589 steel tubes for water and sewage
is : 1978-1982? steel tubes for use in transportation of oil; gas & petroleum products?
bs: 1387 steel tubes for use for water, gas, air and steam
astm a53 standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamless
din 2458 welded steel pipes and tubes
en10217 welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature properties
api 5l line pipe
coating standard:
ansiawwa c104a21.4 american national standard for cement-mortar lining for ductile-iron pipe and fittings for water.