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Haihao Group Supplies P5 Alloy Steel and AISI 321 Stainless Steel Pipe Fittings for Latvia Project
Haihao Group recently completed the production and shipment of a large batch of P5 alloy steel pipe fittings and AISI 321 stainless steel elbows for an industrial customer in Latvia. The order included seamless long radius elbows, concentric reducers, and custom-radius pipe bends manufactured according to ГОСТ 17375-2001, ГОСТ 17378-2001, and ТУ У 24.2-13419172-005-2014 standards.
The project required strict control over chemical composition, bevel preparation, intergranular corrosion resistance, and non-destructive testing. All fittings were manufactured with full traceability and inspected according to the customer’s technical specifications.
AISI 321 stainless steel elbows with corrosion resistance testing manufactured by Haihao Group
Shipment Details of P5 Alloy Steel Pipe Fittings
The first part of the order included seamless 15Х5М (P5) alloy steel pipe fittings designed for high-temperature and high-pressure service environments.
| Product | Specification | Material | Standard |
| 45° Long Radius Elbow | 57×5mm R=75 1.5D | P5 (15Х5М) | ГОСТ 17375-2001 |
| 45° Long Radius Elbow | 159×6mm R=225 1.5D | P5 (15Х5М) | ГОСТ 17375-2001 |
| 30° Pipe Bend | 325×10mm R=900mm | P5 (15Х5М) | ГОСТ 17375-2001 |
| Seamless Concentric Reducer | 219×10mm – 159×8mm | P5 (15Х5М) | ГОСТ 17378-2001 |
| Seamless Concentric Reducer | 325×10mm – 219×8mm | P5 (15Х5М) | ГОСТ 17378-2001 |
| Seamless Concentric Reducer | 325×12mm – 219×10mm | P5 (15Х5М) | ГОСТ 17378-2001 |
AISI 321 Stainless Steel Elbows for Corrosion-Resistant Pipeline Systems
The second part of the shipment included a wide range of AISI 321 stainless steel elbows manufactured according to ТУ У 24.2-13419172-005-2014 specifications.
These fittings were designed for applications requiring excellent resistance to high temperatures and intergranular corrosion.
| Product | Size | Radius | Material |
| 90° Long Radius Elbow | 57×4mm | R=75 | AISI 321 |
| 90° Short Radius Elbow | 133×5mm | R=125 | AISI 321 |
| 90° Long Radius Elbow | 219×8mm | R=300 | AISI 321 |
| 90° Long Radius Elbow | 159×5mm | R=225 | AISI 321 |
| 90° Long Radius Elbow | 108×5mm | R=150 | AISI 321 |
| 90° Long Radius Elbow | 89×5mm | R=120 | AISI 321 |
Strict Quality Requirements for the Latvia Project
To meet the customer’s technical standards, Haihao Group implemented comprehensive inspection and testing procedures throughout production.
Key Technical Requirements
| Inspection Item | Requirement |
| Welded Fittings | No welded elbows or reducers allowed |
| Bevel Preparation | Wall thickness ≤5mm: plain end; >5mm: 30°±3° bevel angle |
| Root Face | 1 ±0.5mm |
| UT Inspection | 100% ultrasonic testing performed |
| Mechanical Testing | Mechanical properties fully verified |
| Hydrostatic Testing | Hydraulic pressure testing completed |
| Intergranular Corrosion Test | AISI 321 elbows passed E-method corrosion testing |
Chemical Composition Control for P5 and AISI 321 Materials
Haihao Group strictly controlled raw materials to ensure compliance with international technical specifications.
P5 (15Х5М) Alloy Steel Chemical Requirements
- C ≤ 0.15%
- Si ≤ 0.5%
- Mn ≤ 0.5%
- Cr: 4.5–6%
- Ni ≤ 0.6%
- Mo: 0.45–0.6%
- S ≤ 0.025%
- P ≤ 0.03%
AISI 321 Stainless Steel Chemical Requirements
- C ≤ 0.08%
- Si ≤ 0.8%
- Ni: 9–11%
- Cr: 17–19%
- Cu ≤ 0.3%
- S ≤ 0.02%
- P ≤ 0.035%
Why Global Customers Choose Haihao Group
Haihao Group has extensive experience manufacturing alloy steel and stainless steel pipeline components for power plants, petrochemical facilities, refineries, and industrial process systems.
Our Advantages
- Full compliance with ГОСТ, ASME, ASTM, DIN, and EN standards
- Advanced hot forming and machining capabilities
- Strict dimensional and NDT inspection process
- Customized production for special radius elbows and reducers
- Fast delivery for international industrial projects
- Complete material traceability and inspection documentation
Contact Haihao Group
If you are searching for a reliable supplier of P5 alloy steel pipe fittings or AISI 321 stainless steel elbows, Haihao Group can provide complete manufacturing, inspection, and export support for your industrial projects.
We welcome inquiries for custom elbows, reducers, tees, bends, and special alloy pipeline components worldwide.