Process:saw (spiral welded) ssaw (spiral submerged-arc welded) quality standard:gb/t3091 welded steel pipe for low pressure liquid deliverygb/t9711 petroleum and natural gas industries--steel pipe for pipelinesis: 3589 steel tubes for water and sewageis : 1978-1982:steel tubes for use in transportation of oil; gas & petroleum productsastm a53 standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamlessdin 2458 welded steel pipes and tubesen10217 welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature propertiesapi 5l line pipesy/t5037 spiral submerged arc-welded steel pipe for pipelines for low pressure field fluid servicesy/t 5040 spiral submerged arc-welded steel pipe pilescj/t 3022 spiral submerged-arc welded steel pipe for municipal heat supplyis : 1978 steel tubes for use in transportation of oil; gas & petroleum productsastm a252 welded and seamless steel pipe pilescoating standard:ansi/awwa c104/a21.4 american national standard for cement-mortar lining for ductile-iron pipe and fittings for wateriso 21809 petroleum and natural gas industries -- external coatings for buried or submerged pipelines used in pipeline transportation systemsdin 30670 polyethylen coatings of steel pipes and fittings. Moq 1 mt.
