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Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.
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Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.Pressure Pipe Fittings · Flanges · Factory Direct

Since 1982. Pressure piping component manufacturer covering elbows, flanges, tees, reducers and project supply.

ISO 9001 quality system · ABS Type Approval · safety-registered manufacturer

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  • Tee
  • Reducer
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  • Pipe Bend

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  • Donglin, Mengcun County, Cangzhou City, Hebei Province, China
  • +86 132 9342 5333
  • haihaojituan@163.com
  • www.haihaohuadian.com

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Insights

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Technical articles, standards comparisons, project case studies and buyer guides on pressure piping components, flanges and forged fittings.

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15 articles· Standards

接管座.jpgStandards
Standards

ASME II Part D Allowable Stress Lookup Explained for Buyers

ASME Section II Part D allowable stress lookup explained for procurement engineers: tables 1A, 1B, 3, derivation rules, and how to use them on a data sheet.

Jun 7, 20267 min readHebei Haihao Group
不锈钢管.jpgStandards
Standards

ASTM A106 vs A53 Carbon Steel Pipe Seamless vs Welded Guide

ASTM A106 vs A53 carbon steel pipe explained for buyers: seamless vs welded manufacturing, silicon content, service limits and decision guide.

Jun 5, 20267 min readHebei Haihao Group
不锈钢管.jpgStandards
Standards

ASTM A312 vs A790 Austenitic vs Duplex Stainless Pipe Guide

ASTM A312 vs A790 explained for buyers: austenitic vs duplex stainless steel pipe, mechanical strength, corrosion resistance and selection logic.

Jun 3, 20267 min readHebei Haihao Group
不锈钢管.jpgStandards
Standards

NORSOK M-650 Manufacturer Qualification North Sea Guide

NORSOK M-650 explained: manufacturer qualification for duplex and high-alloy materials, scope, QTR documentation and how buyers should specify it.

Jun 1, 20267 min readHebei Haihao Group
8字盲板 (2).jpgStandards
Standards

PED 2014/68/EU Compliance: What Fittings Buyers Must Verify

PED 2014/68/EU compliance for piping and fittings: scope, hazard categories, conformity assessment modules and the documentation buyers must demand.

May 30, 20268 min readHebei Haihao Group
8字盲板 (2).jpgStandards
Standards

JIS B2220 Japanese Flange Standards for Export to Japan

JIS B2220 Japanese flange standard explained: 5K to 40K pressure classes, materials, configurations and procurement checklist for export to Japan.

May 28, 20267 min readHebei Haihao Group
锻造.JPGStandards
Standards

EN 1092-1 vs ASME B16.5 Flange Comparison for EU Buyers

EN 1092-1 vs ASME B16.5 flange comparison: PN vs Class system, size ranges, dimensional differences, gasket and bolt compatibility for EU procurement.

May 26, 20268 min readHebei Haihao Group
8字盲板 (2).jpgStandards
Standards

ASME B31.3 vs B31.1 Design Code: When to Use Which

ASME B31.3 vs B31.1 explained for buyers: scope, allowable stress philosophy, NDE, hydrotest and how the choice drives fitting and flange specifications.

May 24, 20268 min readHebei Haihao Group
接管座.jpgStandards
Standards

API 6D Pipeline Valves Overview for International Buyers

API 6D pipeline valves explained for international procurement: scope, valve types, pressure classes, piggability and order specification checklist.

May 22, 20267 min readHebei Haihao Group
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