Mid-frequency bending capability
Manufacturing covers large-diameter bends, formed fittings, machining and heat treatment for project supply.
About Haihao
About Hebei Haihao Group
Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd. has manufactured high-pressure pipe fittings and flanges since 1982. Our 580,000 m² facility in Mengcun County, Cangzhou serves international EPC contractors, refineries, LNG terminals, power plants and chemical processing plants — backed by 660 staff including 26 engineers, ISO 9001 + ABS Type Approval, and 100,000 t/yr capacity across 20 production lines.
1982
Established
580,000 m²
Area
20
production lines
100,000 t
Annual capacity
660+
Workers
30+
Export markets
50 t
Max forging
Ø 5 m
Max flange OD
Capability highlights
Why work with Haihao
ISO 9001:2015
ISO 9001 certified
ABS Type Approval
ABS type approval
100,000 t / year
Annual capacity
30+
Export countries
580,000 m²
Factory area
Since 1982
Founded
Factory tour 2024
Real photos from our Mengcun manufacturing site
Snapshots from this year's factory walk-through — production hall, heat treatment, CNC, vessel shipping and our safety culture. Not stock images.
Factory capability
Manufacturing, Inspection and Project Supply
Annual capacity 100,000 tons; max bend Φ2200 mm, formed fitting DN1500, single forging up to 50 t
Hydrostatic testing
Testing for pressure piping components and project supply quality control.
Nondestructive inspection
Inspection includes chemical analysis, metallographic inspection, physical tests and NDT.
Processes
Key Processes for Pressure Piping Components
ForgingForging & pressingMid-frequency pushingMachiningCold formingHot extrusionHeat treatmentSubmerged arc welding
Inspection capability
Inspection Capability for Quality Control
Chemical analysisMetallographic testPhysical inspectionNondestructive detection
Representative customers and projects
Serving Power, Energy, Chemical and Industrial Projects
- China Blue Chemical Ltd
- China Petroleum & Chemical Corporation
- West Pacific Petrochemical Company Co., Ltd Dalian
- Engro Chemical Pakistan Co., Ltd
- Royal Dutch Shell Public Limited Company
- Beijing Electric Power Construction Company
- Hebei Electric Power Construction Company
- Beijing Gas Group Company Ltd
Qualifications listed in profile
Quality System and Enterprise Qualifications
- ISO9002 Quality System Certificate obtained in 1999
- ISO9001:2000 certificate obtained in 2002
- ABS Type Approval for flanges and pipe fittings received in 2008
- Safety registration enterprise manufacturing pressure pipe fittings
Corporate culture
Earn the market with brand. Serve customers with sincerity.
Mission
Strict control over every link of production — raw material, process, design, manufacturing and inspection — to ensure outstanding product quality.
Vision
Grasp the pulse of the era. Understand the customer. Pioneer innovation.
Core values
Technology and innovation. Continuous learning, perseverance, and progressive ambition — challenge ourselves, transcend the past, and climb toward higher goals.
Spirit
The road is winding and arduous; conviction is enduring and fearless. Every honor we have earned is both a milestone and a new starting line — we will keep pressing forward to open up new horizons.
Milestones
From two lathes to a leader in China's pipe-fittings capital
Since 1982, Haihao Group has grown over 40+ years into an industry leader with the China Famous Trademark distinction, exporting to 20+ countries and regions.
- 198201 / 9
Founding
Started with two lathes and one drilling machine purchased for just over 1,000 RMB — the seed of Haihao Group.
- 199202 / 9
Formal incorporation
Mengcun High-Pressure Flange Factory established — operations enter a standardized phase.
- 199403 / 9
Plant expansion
New facility built along the Xinda highway in Mengcun. Office building and workshops completed, modern equipment introduced.
- 199504 / 9
Designated cooperation plant
Recognized as a designated cooperation factory by the Ministry of Chemical Industry and the Ministry of Electric Power.
- 199705 / 9
Group established
Hebei Haihao High-Pressure Flange & Pipe Fittings Group Co., Ltd. formed; product line diversified.
- 199906 / 9
Provincial brand recognition
"Haihao" recognized as a Famous Brand of Hebei Province and a Hebei Renowned Trademark.
- 200607 / 9
Capital of pipe fittings
Mengcun named the 'Pipe Fittings & Elbows Capital of China' by the China Hardware Products Association.
- 201108 / 9
China Famous Trademark
"Haihao" recognized as a China Famous Trademark by SAIC — the first in our industry to receive this distinction.
- 201409 / 9
6,000-ton forging press
Y10-6000 forging hydraulic press commissioned — filling a capability gap for large-scale forgings in Hebei.
Compliance Matrix
What we have, what we have on request, and what we don't
EPC AVL committees ask for a single matrix instead of a stack of certificate JPGs. Below is our position against the certifications most often required for power, oil & gas, petrochemical and EU pressure equipment work.
Quality management
| Requirement | Status | Notes |
|---|---|---|
| ISO 9001 | Held | Certified, current. CN + EN copies on certificates page. |
| ISO 14001 | Held | Environmental management certified. |
| ISO 45001 | Held | OH&S certified. |
Pressure equipment & EU acceptance
| Requirement | Status | Notes |
|---|---|---|
| PED 2014/68/EU | Held | CE marking under PED held; AD 2000 W0 material documents supplied per order. |
| AD 2000 W0 | On request / partial | Material qualification documents available per project; full plant approval issued case-by-case via TÜV. |
| China TS Special Equipment | Held | Manufacturing permit for pressure pipe components. |
Marine class society type approval
| Requirement | Status | Notes |
|---|---|---|
| ABS Type Approval | Held | Pipe fittings & flanges; held since 2008. |
| BV (Bureau Veritas) | Held | Type approval certificate held. |
| DNV / LR | On request / partial | Witness inspection accepted on order; full type approval not currently registered. |
Oil & gas / sour service
| Requirement | Status | Notes |
|---|---|---|
| NACE MR0175 / ISO 15156 | On request / partial | Manufactured to spec on request: hardness mapping ≤ 248 HV, controlled S/P. HIC (TM0284) per buyer. |
| API 6A wellhead/X-mas | Out of scope | Not within current product scope. |
| NORSOK M-650 (Material qualification) | On request / partial | Duplex / 6Mo / Inconel material qualification handled per project; not a permanent certification. |
Code & dimensional standards
| Requirement | Status | Notes |
|---|---|---|
| ASME B16.9 / B16.5 / B16.47 / B16.11 | Held | Routine production scope for fittings & flanges. |
| EN 10253-2 / EN 1092-1 | Held | EU-bound shipments use EN dimensional and material standards. |
| MSS-SP-75 (WPHY high-yield) | Held | WPHY-52/60/65/70 fittings supplied to gas pipeline projects. |
| JIS B2220 / B2311 / GB/T 9119 | Held | Used for Japan/Korea and PRC domestic projects. |
Material certification & TPI
| Requirement | Status | Notes |
|---|---|---|
| EN 10204 3.1 MTC | Held | Standard for every order; in-house lab validated. |
| EN 10204 3.2 MTC | Held | Issued under TPI witness (SGS / BV / TÜV / DNV / Lloyd's / Intertek / ABS). |
| Stage inspection by buyer / EPC QA | Held | Buyer or EPC QA may witness any hold/witness point at our plant. |
Document samples available under NDA at RFQ stage.
Heat-number traceability
From mother heat to packed crate — six auditable steps
Every fitting, flange or forged item leaves the plant with a heat stamp that links back to its mother MTC, finished MTC, NDT report, heat-treatment chart, TPI sign-off, and stenciled crate. A redacted sample dossier is shared on AVL request.
1 · Heat ID
Mother MTC (EN 10204 3.1) recorded against incoming heat number; bar / billet stamped before cutting.
2 · Finished MTC
Item-level MTC issued post-machining: chemistry, mechanicals, hardness, hydro / impact where applicable.
3 · NDT package
PMI / UT / MT / PT in-house. RT and HIC (NACE TM0284) per buyer ITP. Reports cross-linked to heat number.
4 · PWHT chart
Automatic time-temperature recorder; charts retained 5 years and supplied with shipping documents.
5 · TPI witness
Buyer or third-party (SGS / BV / TÜV / DNV / Lloyd's / Intertek / ABS) signs off hold/witness points; 3.2 MTC issued.
6 · Pack & dispatch
Heat number stenciled on each crate; certificate dossier sealed with shipment for site receipt sign-off.
Redacted sample dossier on AVL request
NACE / Sour service
What we mean when we say we manufacture for sour service
Saying "NACE capable" is not the same as proving it. Below is the list of standards we manufacture against, what we test on every order, and where we draw the line — so the EPC reviewer can decide before opening an inquiry.
Standards we manufacture against
- NACE MR0175 / ISO 15156 (sulfide stress cracking resistance)
- NACE TM0284 (HIC test, 4 sections per heat)
- NACE TM0177 (SSC, on request)
- API 5L PSL2 mother pipe / forged-block source materials
What we test on every sour-service order
- Hardness mapping ≤ 248 HV (22 HRC) on weld + HAZ + base metal
- Sulfur ≤ 0.002 %, P ≤ 0.015 % per heat analysis
- Quench + Temper (Q+T) for higher-strength grades, recorded furnace charts
- Dimensional + visual + 100 % MT/PT on critical surfaces
Where we draw the line
- API 6A wellhead/X-mas tree fittings: not in current scope
- CRA-clad fittings: case-by-case via partner mill, not stock capability
- Sour duplex / super-duplex (UNS S31803 / S32750): material qualification per project, not a default warehouse offer
Honors & certifications
28 certifications · International recognition
Spanning licenses, ISO management systems, marine-class society approvals, central state-owned enterprise supplier qualifications, brand recognition, and utility patents. Click any certificate to enlarge.
