Stainless Steel Pipe Spools | Pre-Fabrication 304 304L 316 316L

Customized SS 304 304L Flanged Pipe Spool, Stainless Steel 316 316L 904L 254SMO Pipe Spool, Duplex 2205 Pipe Spool Fittings Suppliers

Stainless Steel Pipe Spools are a pre-determined length of pipe welded to a specified fitting (Tee, Elbow or Reducer) or valve (Gate or Ball Valve). Flanges are usually welded on each end of the pipe. Due to the excellent corrosion resistance of stainless steel, the pipe is not prone to rust, damage or accumulation of debris due to wear.

Our prefabricated pipe spools adhere strictly to international manufacturing, dimension, and material standards:

Pipe Standards: ASTM A312, ASTM A213, ASTM A269, ASTM A790, ASTM A789, ASTM B677, ASTM B676

Flange & Fitting Standards: ASTM A182, ASME B16.5, ASME B16.9, ASME B16.11

Fabrication & Design Standards: ASME B31.3 (Process Piping), ASME B31.1 (Power Piping), ASME Section IX (Welding Qualifications)

Common Material Grades

Austenitic Stainless Steel: 304, 304L, 316, 316L, 316Ti, 317, 317L, 321, 347, 347H

Super Austenitic & High Nickel Alloys: 904L (N08904), 254 SMO (S31254), AL-6XN (N08367), 1925hMo (N08926)

Duplex & Super Duplex Steel: 2205 (S31803 / S32205), 2507 (S32750), S32760

Key Advantages of Factory-Prefabricated Pipe Spools

Reduced On-Site Labor & Timeline: Eliminates weather-related field delays and minimizes expensive on-site fitting and welding overhead.

Higher Weld Quality: Welded under climate-controlled, optimal shop conditions using automated GTAW (TIG) and GMAW (MIG) welding techniques.

Strict Quality Assurance: 100% inspection before dispatch, including Hydrostatic Testing, Radiographic Testing (RT), Ultrasonic Testing (UT), and Dye Penetrant Inspection (PT).

Dimensional Accuracy: Precision cut and fit using CAD/CAM modeling to ensure exact flange alignment and zero fit-up stress during field hookup.

Fabricated Pipe Spool Parts

Reducers - Concentric Reducers, Eccentric Reducers
Pipes - Seamless/Welded
Tees - Equal Tees, Unequal Tees
Flanges - Blind Flanges, Weld Neck Flanges, Slip-On Flanges, etc.
Elbows - 90° / 45° / 180°

Stainless Steel Pipe Spools

Mechanical Properties (Common Spool Pipe Materials)

Grade	Tensile Strength, min (MPa / ksi)	Yield Strength, min (MPa / ksi)	Elongation, min (%)	Max Hardness (HB)
304	515 / 75	205 / 30	35	192
304L	485 / 70	170 / 25	35	192
316	515 / 75	205 / 30	35	192
316L	485 / 70	170 / 25	35	192
316Ti	515 / 75	205 / 30	35	192
317L	515 / 75	205 / 30	35	217

Advantages of Stainless Steel Pipe Spools:

Time Saving: Can be quickly installed on site, saving construction time.
Cost-effective: Reduce time and labor required on site

Stainless Steel Pipe Spools Features:

Welding method: Plasma welding.
Inspection: PT or RT and pressure test.
Destructive and non-destructive inspection of welds.
Customized according to drawings.

Custom Fabrication & Surface Treatment Options

We deliver fully tailored pipe spool configurations according to isometric drawings (ISO):

Joint Types: Butt-welded, socket-welded, threaded, or flanged connections.

End Prep: Beveled ends, plain ends, or stub ends with lap-joint flanges.

Surface Finishes: Pickled and passivated, sandblasted, mechanical polishing, or custom protective coatings.

Frequently Asked Questions

Q: What is the typical lead time for custom pipe spool prefabrication?

Standard fabrication orders generally ship within 5 to 21 days depending on spool complexity, material availability, NDT testing scope, and total tonnage.

Q: What quality testing documentation is provided with pipe spools?

Every shipment includes full Mill Test Certificates (MTC) according to EN 10204 3.1, along with NDT inspection reports (RT, UT, PT) and hydrostatic test reports. Third-party inspection (SGS, TUV, BV) is available upon request.

Q: Can spools be customized from client isometric drawings?

Yes. Our engineering team works directly from your CAD files or isometric (ISO) drawings to fabricate spools with exact tolerances for seamless field installation.