Custom 317L Stainless Steel Flanged Pipe Spools
As a professional stainless steel pipe spools supplier, we produce high quality custom 317L stainless steel flanged pipe spools.
317L (00Cr19Ni13Mo3 / UNS S31726) stainless steel is a molybdenum-based austenitic stainless steel. With L behind the number, 317L is a low carbon grade. It has stronger resistance to chemical corrosion than conventional chromium-nickel austenitic stainless steels such as 304 alloy. In addition, 317L alloy has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance than conventional stainless steel. It exhibits anti-sensitization properties during welding and heat treatment.
The 317L pipe spool is a kind of pipe fittings manufactured by forming 317L welded pipes and fittings. We manufacture 317L 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 317L Stainless Steel Flanged 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 317L Stainless Steel Flanged Pipe Spools Specifications
| Product Name | Custom 317L Stainless Steel Flanged Pipe Spool |
| Raw Materials | 317L/1.4438 |
| 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 317L Stainless Steel Flanged Pipe Spools Chemical Composition
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
| 317L | ASTM A240 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.00-20.00 | 11.00-15.00 | 3.0-4.0 |
Custom 317L Stainless Steel Flanged Pipe Spools Applications & Usages
1. Chemical & Petrochemical Industry
– Transporting corrosive chemicals, acids, and solvents
– High-pressure and high-temperature pipeline systems
– Heat exchanger connections
2. Marine & Offshore Industry
– Seawater cooling systems
– Ballast water treatment pipelines
– Oil and gas processing units
3. Pharmaceutical & Food Processing
4. Power Generation
– Cooling water pipelines in nuclear and thermal power plants
– Steam transport systems
– Flue gas desulfurization (FGD) units
5. Water Treatment & Desalination
– Reverse osmosis (RO) and ultra-filtration (UF) systems
– High-salinity and wastewater transport
– Brine and chemical dosing pipelines
6. Oil & Gas Industry
– Offshore platform piping systems
– Refinery process pipelines
– Subsea pipeline systems
7. Aerospace & Automotive
– Exhaust and fluid transport systems
– Aerospace hydraulic fluid piping
– High-performance engine cooling
Custom 317L Stainless Steel Flanged 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 317L Stainless Steel Flanged Pipe Spools Manufacturer In China
Custom 317L Stainless Steel Flanged Pipe Spools: The Ultimate Guide
When you choose to buy Custom 317L Stainless Steel Flanged Pipe Spools, there have some important points we need to know before we get started.
What are Custom 317L Stainless Steel Flanged Pipe Spools?
As a professional stainless steel pipe spools supplier, we produce high quality custom 317L stainless steel flanged pipe spools.
317L (00Cr19Ni13Mo3 / UNS S31726 / 1.4438) stainless steel is a molybdenum-based austenitic stainless steel. With L behind the number, 317L is a low carbon grade. It has stronger resistance to chemical corrosion than conventional chromium-nickel austenitic stainless steels such as 304 alloy. In addition, 317L alloy has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance than conventional stainless steel. It exhibits anti-sensitization properties during welding and heat treatment.
The 317L pipe spool is a kind of pipe fittings manufactured by forming 317L welded pipes and fittings. We manufacture 317L pipe spool strictly according to ASTM standard.
Custom 317L Stainless Steel Flanged Pipe Spools standards comparison table
| 317L Stainless Steel Standards Comparison Table | |||||||||
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | ||
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS | |
| 317L | 317L | S31703 | 022Cr19Ni13Mo3 | 1.4438 | X2CrNiMo18-15-4 | – | – | SUS 317L | |
Features of Custom 317L Stainless Steel Flanged Pipe Spools
Grade 317L features good seawater resistance and SCC resistance compared to 316L. It is used in chemical equipment such as chemical ships and chemical products such as reactor. In terms of chemical composition, 317L increases chromium, nickel, molybdenum by 2%, 1%, 1% respectively in comparison with 316, while these three elements are the main elements that determine stainless steel performance.
However, 317L has poor corrosion resistance in strong oxidizing acids such as nitric acid. Basically, 317L has similar performance like 317. Due to lower carbon, 317L has better welding performance and intergranular corrosion resistance at high temperatures (427~816 °C).
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