Quality Standard:
ERW HFI, EFW, LSAW, DSAW
GB/T3091 Welded steel pipe for low pressure liquid delivey
GB/T9711 Petroleum and natural gas industries-Steel pipe for pipelines
IS: 3589 Steel tubes for water and sewage
IS: 1978-1982 Steel tubes for Water, Gas, Air and Steam
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Products: inline water heaters,
ionic air filter