Prefabrication Piping Spools
Prefabricated Pipe Spools are made of pipes and fittings (such as elbows, flanges, tees, reducers, etc.). It is welded from steel pipes, fittings, elbows, reducers, flanges and other parts of various pipelines, so that customers do not need to spend more personnel,production and testing equipment on the project site, which greatly reduces the cost of industrial engineering projects such as the oil and gas industry.
JN ALLOY has professional and mature experience in custom production of prefabricated welding products, and can customize various welding products according to customer drawings and needs. We have successfully customized prefabrication products of materials such as 304, 316, 254SMO, 2205 for customers many times.


All production standards comply with the American Society of Mechanical Engineers ASME ASTM and other international standards, or other standards required by customers to ensure that the product quality is 100% in line with the requirements. Radiography, PMI, MPI, ultrasonic testing, water pressure testing, etc. can be carried out under the strict supervision of third-party(BV,SGS etc.)inspection agencies.
Now more and more industrial construction projects such as oil refineries, chemical plants and power plants are beginning to tend to use steel pipes and fittings as raw material parts welded together and then installed on site. Customized Prefabrication Pipe Spools is a better cost-saving option.
Fabricated Pipe Spool Parts and Specification
Parts:
Pipes, Flanges, Elbows, Tees, Reducers etc.
Pipes – Seamless/welded
Elbow – 45 degree elbow, 90 degree elbow, SR, LR
Reducers – Concentric reducer, eccentric reducer
Tees – Equal Tee, Unequal Tee
Cross
End Cap
Flanges – Blind, Weld Neck(WN), Socket Weld(SW), Slip-On(SO) etc.

| Material | Grades | Pipe | Flange | Fittings | Standard |
| Stainless steel Pipe Spools |
304,304L,316,316L,317,317L,321,347,254SMO |
ASTM A312 | ASTM A182 | ASTM A403 |
ASME B36.10 ASME B36.19 ASME B16.5 ASME B16.47 ASME B16.9 ASME B16.11 |
| Duplex Pipe Spools | S31803,S32205,S32750 | ASTM A790 | ASTM A815 | ||
| Hastelloy Pipe Spools | Alloy B2, B3, C276, X, C2000 | ASTM B622 | ASTM B564 | ASTM B366 | |
| Inconel Pipe Spools | Alloy 600, 601, 625, 718 | ASTM B444/ B474 | |||
| Incoloy Pipe Spools | Alloy 800, 800H, 800HT, 825 | ASTM B407 | |||
| Monel Pipe Spools | Alloy 400 | ASTM B165 |
Fabricated Pipe Spool Application
- Marine and Marine Equipment Industry
- Chemical Industry Plant
- Mining Industry
- Oil, Gas & Pipeline Facilities
- Food & Beverage Facilities
- Water & Wastewater Treatment Plant
- Power Generation Plant
- Other Industrial Plants

JN ALLOY Prefabrication Cases
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JN ALLOY has professional pipe fitting flange production capabilities and professional welding services. We can produce pipeline fittings flanges and other products required by customers according to the specified quality and precision, and directly weld them. All produced pipe fitting flanges will meet relevant manufacturing standards such as ASTM ASME etc
