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API 5L X52 Tee Manufacturing for Large-Diameter Pipeline Applications
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API 5L X52 Tee Manufacturing for Large-Diameter Pipeline Applications

2026-08-21 15:17:23 Views:21 Company News

Haihao Group has supplied a batch of large-diameter pipeline fittings for a Saudi Arabia NEOM project, including 80-inch equal tees and reduced tees manufactured from API 5L X52 PSL-2-W plate.

The order focuses on large-diameter branch connections with reinforcement pads. The supplied products include an 80-inch equal tee, an 80-inch × 48-inch reduced tee and a 72-inch × 48-inch reduced tee. Wall thicknesses range from 15.88 mm to 20.62 mm.

For large pipeline systems, the fitting itself is only one part of the engineering requirement. Material properties, branch reinforcement, dimensional control and corrosion protection all need to be considered together. This is why the production of API 5L X52 fittings requires careful coordination between material preparation, fabrication, inspection and coating.

Hebei Haihao Group undertakes Saudi Arabia's NEOM project 80 inch pipe fittings with external 3PE and internal FBE coating

Hebei Haihao Group undertakes Saudi Arabia’s NEOM project 80 inch pipe fittings with external 3PE and internal FBE coating

Product Parameters

The main product parameters from this project are shown below.

Product Size Wall Thickness Material Raw Material Coating
Equal Tee with Reinforcement Pad 80″ 20.62 mm API 5L X52 PSL-2-W Plate External 3PE / Internal FBE
Reduced Tee with Complete Reinforcement Pad 80″ × 48″ 20.62 mm / 15.88 mm API 5L X52 PSL-2-W Plate External 3PE / Internal FBE
Reduced Tee with Complete Reinforcement Pad 72″ × 48″ 19.05 mm / 15.88 mm API 5L X52 PSL-2-W Plate External 3PE / Internal FBE

The use of reinforcement pads is particularly relevant to these large branch connections. Instead of treating the tee as a simple change in flow direction, the branch area is manufactured with additional reinforcement according to the project design.

API 5L X52 PSL-2 Material Analysis

The material test record supplied for this project includes chemical composition analysis. The reported values are listed below.

C Mn S P Si Cr Ni Mo Cu V Ti Nb B CEpcm
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
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
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
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
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
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 material specification limits shown in the inspection record include 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

The supplied material records also include mechanical testing under ASTM A370.

Test Y.S. Rp0.2 (MPa) T.S. BM (MPa) T.S. Transverse WM (MPa) Elongation (%) Hardness (HBW)
Test 1 443 / 467 531 / 570 — / 575 43 / 28 160/155/158 / 198/201/207
Test 2 458 / 460 563 / 565 — / 568 41 / 32 165/162/162 / 196/196/197
Test 3 464 / 458 525 / 560 — / 562 39 / 28 165/164/167 / 212/216/211

The test record shows reference ranges of 360–530 MPa yield strength, 460–760 MPa tensile strength and ≥20% elongation.

3PE and FBE Protection for Large Pipeline Fittings

The finished fittings are specified with 3PE external coating and FBE internal lining.

External 3PE protection is applied to the outside surface, while FBE provides an internal protective layer. For large-diameter pipeline components, coating quality is important because the fitting may be exposed to different service environments on its internal and external surfaces.

The coating arrangement supplied for this project is:

  • External: 3PE
  • Internal: FBE
  • Product size: up to 80 inches
  • Material: API 5L X52 PSL-2-W
  • Raw material: Plate

Quality Documentation

Haihao Group holds ABS, API, ISO, BV, CE and EAC certifications. For this project, material analysis and mechanical testing provide additional technical documentation for the supplied fittings.

The combination of large-diameter fabrication, reinforced branch design and dual-surface coating makes this project a useful example of Haihao Group’s capability in supplying customized API 5L X52 fittings for major pipeline applications.

If you are sourcing large-diameter tees or other pipeline fittings, contact Haihao Group with your required size, material, wall thickness, reinforcement design and coating specification.

 

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