steel pipes and steel fabrication supplier-HUNAN GRAND STEEL PIPE CO.,LTD

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We are a 20-years’ steel pipe’s and pipe fittings manufacturer and exporter, as well as one of the leading gas & oil pipeline, structure & pile pipe manufacturer in China.

Our main products include carbon steel pipe, stainless steel pipe fittings, Below is the detailed information:

Carbon Steel pipe:
Seamless steel pipe: OD: 1/4inch-32inch; WT: 1.73mm-50mm ;LENGTH: 5.8M/6M/12M
ERW steel pipe: OD: 1/4inch-24inch; WT: 1.73mm-20mm ;LENGTH: 5.8M/6M/12M
LSAW steel pipe: OD: 18inch-56inch; WT: 8mm-50mm ;LENGTH: 5.8M/6M/12M
Spiral Steel Pipe: OD: 8inch-3500mm; WT: 5mm-25mm ;LENGTH: 5.8M-45M
Hollow Section: Square tube & rectangular tube, RHS,SHS

Pipe fittings ( ASTM / ASME A234 WPB | ASTM/ASME (S)A403 TP 304(L), 316(L), 321(H), 347(H)
Elbows, Return Bends, Tees, Reducers and Caps
Sizes from ½” up to 36″
Sch 40 up to sch XXS
Flanges (ASTM A105 / EN1092-1)
Flat plate flange; Slip on flange; RF flange; blind flange., etc
Size from ½” up to 80″
Our steel pipes and fittings comply with national as well as international standards such as API, ASTM, DIN, JIS, and ANSI ., etc.
Our purchase will be complemented with courteous, professional and economical guidance and service.
We are faithfully looking forward to your kind inquiry.

Best Regards
Eddy Yang
Project Manager | Line pipe Division
HUNAN GRAND STEEL PIPE CO., LTD

中威钢铁有限公司是安钢集团成立的专业生产钢管及管件、库存数量、一周销售的子公司。我们致力于为全球客户提供钢管产品一站式服务。

中威拥有三个领先的钢管生产和研发技术、先进齐全的检测设施，严格按照ISO 9001质量管理体系进行现场管理，已获得ISO 9001、ISO 14001、ISO 45001、CE、AAA级资信等级认证等。产品获得SGS、BV、MOODY、TUBOSCOPE等国际权威第三方机构的检验认可。

多年来，中威供应商的物资广泛认可：石油天然气开采、管道运输、城市管网建设、建筑施工、港口港口建设、食品医药工厂建设。我们的合作伙伴遍及东南亚、中东、欧洲、非洲、南美洲、大洋洲等多个国家和地区。100个国家和地区。我们还为世界500强石油天然气、EPC公司提供多种管材产品和服务，如：中石油、斯伦贝谢、ADNOC、PDVSA、NNPC、ENI、NICO、EGPC、OXY、CCED、OGDCL、PEMEX等。

The processing technology of galvanized steel pipes encompasses pretreatment, electroplating, and post-treatment, each influenced by various factors. Six key factors affecting the quality of electroplated coatings are identified:

l Zinc purity affects coating thickness and iron content.

l Sodium hydroxide levels impact solution stability and coating quality.

l Iron content influences passivation and corrosion resistance.

l Polishing methods affect coating brittleness and uniformity.

l Temperature alters coating properties and deposition rates.

l Cathode movement speed determines coating uniformity and quality.