Custom 304L Stainless Steel Prefabricated Pipe Spools
As a professional stainless steel pipe spools supplier, we produce high quality custom 304L stainless steel prefabricated pipe spools.
Known as ultra-low carbon stainless steel pipe spool, grade 304L is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). 304L is a lower carbon variant of 304 stainless steel, suitable for applications requiring welding. The lower carbon content minimizes carbide precipitation in the heat affected zone around the welding sections, which in result eliminates intergranular corrosion (weld erosion) in certain environments.
The 304L pipe spool is a kind of pipe fittings manufactured by forming 304L welded pipes and fittings. We manufacture 304L pipe spool strictly according to ASTM standard.
Our factories and fabrication facilities are filled with highly skilled craftsmen, pipe fitters, pipe fabricators, pipe welders with excellent safety and quality performance records. We take great pride in not only meeting, but exceeding our customers’ expectations in all areas, including performance, design, logistics, schedule, delivery and cost.
Your Trusted Custom 304L Stainless Steel Prefabricated Pipe Spools Manufacturer In China
Seather specializes in the manufacturing of nickel alloy and custom pipes spools products for a wide range of industries, including aerospace, petrochemical, power generation, marine, chemical processing and many others.
Seather’s products are known for their superior strength, durability, and resistance to corrosion, making them ideal for use in demanding and harsh environments.
Seather provides a complete range of services, from consultations and analysis to design, quality assurance, and global logistics. The company’s experienced team of engineers and technicians work closely with customers to understand their needs and provide customized solutions to meet their unique requirements.
Whether it’s a simple fabrication project or a complex multi-phase project, Seather has the expertise and experience to deliver quality results.
If you want to purchase custom 316L stainless steel flanged spooled pipes, why not contact us here for saving your time and money?
Custom 304L Stainless Steel Prefabricated Pipe Spools Specifications
| Product Name | Custom 304L Stainless Steel Flanged Pipe Spool |
| Raw Materials | 304L / UNS S30403 / W.Nr. 1.4306 |
| Size | 114mm to 2500mm Diameter (Seamless & Welded, Fabricated), Wall Thickness: 10s/3 mm to XXS/70 mm; Customized or according to your drawing |
| Samples | Sample available |
| Tolerance | +/-5mm to +/-0.005mm |
| Testing Equipment | CMM; Tool microscope; multi-joint arm; Automatic height gauge; Manual height gauge; Dial gauge; Marble platform; Roughness measurement |
| Logo | Custom logo available |
| Surface Treatment | Anodizing, Passivation, Polishing, Plating, Painting, Black Oxide, Powder Coating, Brushing, Heat Treatment, Surface Phosphating, Hot Dip Galvanizing, More Surface Treatment, etc. |
| Color | Silver, black, gold, red, green, blue, purple, etc |
| File Formats | UG, SolidWorks, Pro/E, AutoCAD (DXF, DWG), PDF, TIF, JPG, etc |
| Services | OEM/ODM, Engineering&Design Consulting, Assembly, Finishing, Materials Sourcing, Custom Packaging Services, etc |
| Quality System | ISO9001, SGS, TUV |
Custom 304L Stainless Steel Prefabricated Pipe Spools Chemical Composition
The chemical components of grade 304L stainless steel is summarized in the following table:
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
| 304L | ASTM A240 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.00-20.00 | 9.00-12.00 | – |
Custom 304L Stainless Steel Prefabricated Pipe Spools Applications & Usages
1) Instruments and equipment exposed to chemical, coal and petroleum environments which demand high intergranular corrosion resistance;
2) Heat resistant equipment parts;
Custom 304L Stainless Steel Prefabricated Pipe Spools Production Process
The production of custom spooled pipes involves several precise steps to ensure high quality, durability, and corrosion resistance. Below is a step-by-step breakdown of the process:
1. Material Selection & Inspection
Raw Material: pipes and fittings are sourced according to customer specifications.
Quality Check: The materials undergo chemical composition and mechanical property testing to ensure compliance with ASTM, or other relevant standards.
2. Cutting & Preparation
Pipes are cut to length using band saws, plasma cutters, or laser cutters, ensuring precision.
Edge preparation is performed to ensure smooth welding and proper flange fitting.
3. Flange Attachment & Welding
Flange Positioning: Stainless steel flanges (e.g., slip-on, weld neck, lap joint, or blind) are aligned with the pipe ends.
Welding Process:
TIG (GTAW) or MIG (GMAW) welding is commonly used for superior corrosion resistance.
Full penetration welds are applied to ensure structural integrity.
If required, purging with argon gas is used to prevent oxidation inside the pipe.
4. Post-Weld Treatment
Pickling & Passivation: Removes weld discoloration and restores the protective chromium oxide layer.
Solution Annealing (if needed): Enhances corrosion resistance and mechanical properties.
5. Dimensional & Non-Destructive Testing (NDT)
Dimensional Inspection: Ensures pipe length, flange alignment, and tolerances are within specification.
Hydrostatic Testing: Pipes are tested under pressure to check for leaks.
X-ray (Radiographic) or Ultrasonic Testing: Detects internal weld defects.
Dye Penetrant Test (DPT): Identifies surface cracks.
6. Surface Finishing & Coating (Optional)
Bead blasting or mechanical polishing for a smooth finish.
Electropolishing for ultra-clean applications (e.g., food & pharma industries).
Epoxy or anti-corrosion coatings for harsh environments.
7. Marking & Documentation
Pipes are laser-etched or stamped with heat number, material grade, size, and standard compliance.
A mill test certificate (MTC) is provided for material traceability.
8. Packaging & Delivery
Flanged pipes are protected with plastic caps and packed using wooden crates or pallets for safe transportation.
If required, pipes are pre-assembled with gaskets and bolts for easier installation at the site.
Your Reliable Custom 304L Stainless Steel Prefabricated Pipe Spools Manufacturer In China
Custom 304L Stainless Steel Prefabricated Pipe Spools: The Ultimate Guide
When you choose to buy Custom 304L Stainless Steel Flanged Spooled Pipes, there have some important points we need to know before we get started.
What are Custom 304L Stainless Steel Prefabricated Pipe Spools?
As a professional stainless steel pipe spools supplier, we produce high quality custom 304L stainless steel prefabricated pipe spools.
Known as ultra-low carbon stainless steel pipe spool, grade 304L is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). 304L is a lower carbon variant of 304 stainless steel, suitable for applications requiring welding. The lower carbon content minimizes carbide precipitation in the heat affected zone around the welding sections, which in result eliminates intergranular corrosion (weld erosion) in certain environments.
The 304L pipe spool is a kind of pipe fittings manufactured by forming 304L welded pipes and fittings. We manufacture 304L pipe spool strictly according to ASTM standard.
Custom 304L Stainless Steel Prefabricated Pipe Spools standards comparison table
| 304L Stainless Steel Standards Comparison Table | ||||||||
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 304L | 304L | S30403 | 022Cr19Ni10 | 1.4307 | X 3 CrNi 18 10 | 03KH18N11 | 2352 | SUS 304L |
Features of Custom 304L Stainless Steel Prefabricated Pipe Spools
304L embodies all the features of type 304, such as excellent corrosion resistance and heat resistance. It remains good corrosion resistance post welding or stress relief. It also features deep drawing performance and excellent polishing. 304L is most widely used with low temperature strength and good mechanical properties. It features a single-phase austenite structure, free from heat treatment hardening phenomenon. 304L is non-magnetic and used under temperature -196-800°C.
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Contact us today and we’ll put together a quote tailored to your needs.
