Haihao Group Supplies Large-Diameter X52 PSL-2 Tees for Saudi NEOM Project
Haihao Group has completed the production of large-diameter pipe fittings for a Saudi Arabia NEOM project, including 80-inch equal tees and reduced tees with reinforcement pads. Manufactured from API 5L X52 PSL-2-W plate, these fittings are designed for a large-diameter pipeline system where dimensional control, material traceability and coating protection are important project requirements.
The order includes 51 pieces of 80-inch equal tees, 22 pieces of 80″/48″ reduced tees and 6 pieces of 72″/48″ reduced tees. The fittings are supplied with an external 3PE coating and internal FBE lining, providing a combined corrosion-protection system for demanding pipeline service.
80-Inch X52 Fittings for the NEOM Project
Large-diameter fittings require more than simply increasing the dimensions of a conventional tee. The forming process, reinforcement design, welding quality, heat treatment, dimensional accuracy and coating application all need to be controlled together.
For this Saudi project, Haihao Group produced API 5L X52 fittings in several configurations. The equal tee is supplied in 80-inch size with a 20.62 mm wall thickness, while the reduced tees connect different pipeline diameters and use different wall thicknesses.
Hebei Haihao Group undertakes Saudi Arabia’s NEOM project 80 inch pipe fittings with external 3PE and internal FBE coating
Product and Order Details
| Product | Size | Wall Thickness | Material |
| Equal Tee with Reinforcement Pad | 80″ | 20.62 mm | API 5L X52 PSL-2-W |
| Reduced Tee with Complete Reinforcement Pad | 80″ × 48″ | 20.62 mm / 15.88 mm | API 5L X52 PSL-2-W |
| Reduced Tee with Complete Reinforcement Pad | 72″ × 48″ | 19.05 mm / 15.88 mm | API 5L X52 PSL-2-W |
The raw material is plate, and the production records provide heat numbers for material traceability. This is particularly important for large-diameter API 5L X52 fittings, where material documentation must remain linked to the finished component throughout manufacturing and inspection.
Chemical Composition of API 5L X52 Material
The supplied inspection data records the chemical composition of the material used for the fittings. The specification limits and actual product analysis values are shown below exactly according to the provided test record.
Chemical Composition – Product Analysis (%)
| Heat No. | Test | C | Mn | S | P | Si | Cr | Ni | Mo | Cu | V | Ti | Nb | B | CEpcm |
| 25120358D | P | 0.068 | 1.32 | 0.0023 | 0.013 | 0.212 | 0.232 | 0.131 | 0.007 | 0.014 | 0.002 | 0.011 | 0.027 | 0.0004 | 0.16 |
| H | 0.070 | 1.38 | 0.004 | 0.014 | 0.200 | 0.030 | 0.010 | 0.010 | 0.020 | 0.002 | 0.020 | 0.020 | 0.0005 | 0.16 | |
| 25120360D | P | 0.074 | 1.35 | 0.0019 | 0.015 | 0.209 | 0.234 | 0.131 | 0.008 | 0.014 | 0.002 | 0.015 | 0.029 | 0.0004 | 0.17 |
| H | 0.070 | 1.34 | 0.004 | 0.011 | 0.200 | 0.030 | 0.020 | 0.003 | 0.010 | 0.002 | 0.020 | 0.020 | 0.0003 | 0.14 | |
| 25120362D | P | 0.072 | 1.33 | 0.0016 | 0.013 | 0.256 | 0.230 | 0.141 | 0.007 | 0.014 | 0.002 | 0.012 | 0.029 | 0.0004 | 0.16 |
| H | 0.070 | 1.37 | 0.004 | 0.013 | 0.200 | 0.030 | 0.020 | 0.010 | 0.020 | 0.002 | 0.020 | 0.020 | 0.0004 | 0.16 |
The specification limits shown on the original test record are C ≤0.24, Mn ≤1.40, S ≤0.015, P ≤0.025, Si ≤0.45, Cr ≤0.30, Ni ≤0.30, Mo ≤0.15, Cu ≤0.50, V ≤0.10, Ti ≤0.04, Nb ≤0.05, B ≤0.001 and CEpcm ≤0.25.
Mechanical Test Results
Mechanical testing was recorded according to the ASTM A370 test section shown in the supplied inspection data. The results include yield strength, tensile strength, elongation and hardness.
Mechanical Properties
| Heat No. | Y.S. Rp0.2 (MPa) | T.S. BM (MPa) | T.S. Transverse WM (MPa) | Elongation E (%) | Hardness (HBW) |
| 25120358D | 443 / 467 | 531 / 570 | — / 575 | 43 / 28 | 160/155/158 / 198/201/207 |
| 25120360D | 458 / 460 | 563 / 565 | — / 568 | 41 / 32 | 165/162/162 / 196/196/197 |
| 25120362D | 464 / 458 | 525 / 560 | — / 562 | 39 / 28 | 165/164/167 / 212/216/211 |
The test record indicates the applicable mechanical property ranges as 360–530 MPa for yield strength, 460–760 MPa for tensile strength and ≥20% elongation.
External 3PE Coating and Internal FBE Lining
For the Saudi NEOM project, the large-diameter fittings are specified with 3PE external coating and FBE internal lining.
The two coating systems serve different protection requirements:
- 3PE external coatingprovides multi-layer protection against external moisture, soil and corrosive environmental conditions.
- FBE internal liningforms a protective barrier on the internal surface of the fitting.
- The combination is suitable for large-diameter pipeline components where both external and internal corrosion protection need to be considered.
For 80-inch X52 fittings, coating application also requires careful handling of the large component surfaces, including surface preparation, coating uniformity and inspection before shipment.
Reinforced Tee Manufacturing for Large-Diameter Pipelines
The order includes both equal and reduced tees with reinforcement pads. Compared with standard small-diameter fittings, large-diameter tees involve significantly greater component dimensions and require close control of the branch connection area.
The supplied configuration includes:
- 80″ equal tee with reinforcement pad
- 80″ × 48″ reduced tee with complete reinforcement pad
- 72″ × 48″ reduced tee with complete reinforcement pad
- Wall thicknesses from 88 mm to 20.62 mm
- API 5L X52 PSL-2-W plate as the stated raw material
- External 3PE coating
- Internal FBE lining
These API 5L X52 fittings were produced for a specific large-scale infrastructure application rather than as standard stock items, allowing the manufacturing process and inspection records to follow the project’s specified requirements.
Quality Control and Certification
Large-diameter pipeline fittings require traceability from raw material through final inspection. For this project, the documentation includes heat numbers, chemical composition and mechanical test results.
Haihao Group’s certification portfolio includes ABS, API, ISO, BV, CE and EAC certifications. Combined with material and test documentation, these capabilities support the supply of large-diameter fittings for international pipeline projects.
For customers sourcing API 5L X52 fittings, Haihao Group can provide project-specific manufacturing based on size, wall thickness, reinforcement configuration, coating system and inspection requirements.
Looking for Large-Diameter Pipeline Fittings?
The Saudi NEOM project demonstrates Haihao Group’s ability to manufacture and supply 80-inch API 5L X52 fittings with reinforced tee configurations and combined 3PE/FBE corrosion protection.
If your project requires large-diameter tees, reducers or other pipeline fittings, send us your drawings, material specification, dimensions and coating requirements. Our engineering and production teams can review the requirements and provide a suitable quotation.