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  What are the quality inspections of seamless steel pipes?

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  Characteristics of deep sea pipeline steel pipe

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  Difference between oil pipeline and natural gas pipeline

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  Looking back at 2022, gathering strength, looking forward to 2023, forge ahead !

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  Shipping piping products for Qatar customers

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  Alternative method of hydrostatic test

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  The situation that industrial pipelines cannot be subjected to hydrostatic testing

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  Customers purchase H-beam steel

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  New opportunities – Mozambique customers

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  Orders for swage forgings made of A182 F53

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  2022 China Marine Economy Expo opens in Shenzhen

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  Haihao Group Brings Piping Products to the 2022 China Marine Economy Expo

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  Shipping for UAE customers

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  Haihao Group was invited to attend the 2022 SSNAME Academic Conference

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  New Opportunities for Nuclear Power Development

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  Haihao Group will attend the 2022 China Marine Economic Expo in November

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  Delivery of elbow and other piping products customized by British customers

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  Deliver seamless steel pipes to Indonesian customers

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  Shipping for Qatar customers

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  Welding requirements for split tee

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  The factory still delivers goods before the National Day

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  Differences between argon arc welding and electric arc welding

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  TENSION ROD 20 WITH TWO NUTS

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  The difference between API 5L and API 5CT pipe