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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

Products

  • Elbow
  • Tee
  • Reducer
  • Flange
  • Pipe Bend

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Contact

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

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Insights

Insights & Knowledge Center

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

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263 articles

8字盲板 (2).jpgBuyer guide
Buyer guide

Metallic vs Nonmetallic Flange Gaskets: ASME RFQ Guide

Compare ASME B16.20 metallic and B16.21 nonmetallic flat gaskets, and clarify what each standard actually covers before you issue an RFQ.

Aug 20, 20266 min readHebei Haihao Group
锻三通11.jpgStandards
Standards

ASME B16.11 Forged Fittings: Socket-Weld and Threaded Classes

ASME B16.11 defines Class 2000, 3000, 6000 for threaded fittings and Class 3000, 6000, 9000 for socket-weld fittings. This guide explains what these classes mean, how to specify them, and what to verify when procuring forged fittings.

Aug 19, 20266 min readHebei Haihao Group
全图片.JPGTechnical
Technical

ASME B16.52 Nonferrous Forged Fittings and Copper Alloy Checks

Understand the difference between ASME B16.52 for nonferrous forged fittings and ASTM B283/B283M for copper alloy die forgings, plus RFQ and inspection guidance.

Aug 18, 20266 min readHebei Haihao Group
化工厂.jpgCase studies
Case studies

Amiral Petrochemical Complex: A Source-Based Piping Procurement Reference

Explore the Amiral petrochemical complex project in Saudi Arabia as a reference for piping procurement. Learn about the project scope, key considerations for EPC buyers, and how to apply these insights to your own sourcing strategies.

Aug 17, 20266 min readHebei Haihao Group
6米立车.JPGIndustry news
Industry news

Ruwais LNG Equipment Awards Put Electrified Liquefaction in the Procurement Spotlight

ADNOC's Ruwais LNG project, a 9.6 mtpa clean-power facility, has awarded critical equipment contracts worth over $400 million, including 75 MW electric motor-driven compressors. For EPC buyers, this signals a shift toward electrified liquefaction and new procurement considerations.

Aug 16, 20266 min readHebei Haihao Group
p01_010_343936e3e2eaef1d3c6a0d2cf0887ddb.jpgBuyer guide
Buyer guide

ASME B16.10 Valve Face-to-Face Dimensions: An RFQ Checklist

Use this RFQ checklist to specify ASME B16.10 valve face-to-face dimensions correctly and avoid installation mismatches in your piping system.

Aug 15, 20267 min readHebei Haihao Group
衬塑弯头 (2).jpgStandards
Standards

ASME B16.48 Line Blanks: Scope, Classes and Buyer Limits

ASME B16.48 covers line blanks from NPS 1/2 to NPS 24 for ASME B16.5 flanges in pressure classes 150–2500. Learn what the standard includes, what it doesn't, and how to specify and inspect these components.

Aug 14, 20266 min readHebei Haihao Group
全图片.JPGTechnical
Technical

Socket-Weld Fitting Dimensions and Material Checks

Confirm socket-weld fitting dimensions per ASME B16.11 and material to ASTM A105. Learn what to specify, inspect, and include in the RFQ.

Aug 13, 20265 min readHebei Haihao Group
渗透检测(PT).JPGTechnical
Technical

PT vs MT for Weld Pores: Which NDT Method Should Buyers Specify?

PT and MT are both surface inspection methods, but they do not solve every pore or weld defect problem. Learn when PT, MT, UT or RT should be specified.

Aug 12, 20266 min readHebei Haihao Group
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