316/316L Austenitic Stainless Steel Pipe

The 316/316LStainless Steel Pipeproduced by Womic Steel conforms to multiple international specifications used in industrial and pressure applications:

These standards ensure that 316/316L Stainless Steel Pipe meet global requirements for chemical composition, mechanical performance, testing, and dimensional accuracy.

Different specifications can be customized according to special requirements.

Both 316 and 316L Seamless & Welded Stainless Steel Pipes exhibit excellent corrosion resistance and mechanical properties. The lower carbon content in 316L minimizes carbide precipitation during welding, providing enhanced resistance to intergranular corrosion compared to standard 316, especially in high-temperature or welded service environments.

The316 and 316L Stainless Steel Pipeoffers balanced strength and ductility, making it suitable for forming, welding, and machining applications.

Both 316 and 316L pipes are solution annealed at 1040–1080°C followed by rapid cooling. This heat treatment restores full corrosion resistance, relieves internal stresses, and enhances ductility, ensuring the pipes perform reliably in demanding chemical, marine, and offshore applications,prevents intergranular corrosion after welding.

Pipes are normally supplied in annealed and pickled condition, providing a clean, smooth surface and excellent corrosion resistance. Upon request, bright annealed or polished finishes can be provided to meet specific sanitary, aesthetic, or industrial requirements.

Womic Steel adopts advanced production technology to ensure each316 and 316L Seamless Stainless Steel Pipemeets exact specifications and flawless surface quality.

1. Raw Material Selection:High-quality316 and 316LStainless Steel Pipe billets from certified mills (Baosteel, TISCO, POSCO).

2. Heating and Piercing:Billets heated to a controlled temperature and pierced using a rotary piercing mill to form hollow shells.

3. Hot Rolling:Shells elongated and rolled to desired size.

4. Cold Drawing / Cold Pilgering:Pipes refined to precise dimensions and improved surface finish.

5. Solution Annealing:Heat treatment to restore corrosion resistance and ductility.

6. Pickling & Passivation:Removal of oxides and creation of passive film for enhanced corrosion protection.

7. Straightening and Dimensional Calibration:Ensures consistent roundness and wall uniformity.

8. Final Inspection & Marking:Each pipe tested, marked with grade, heat number, and standard before packing.

This process guarantees a smooth internal bore, high structural integrity, and exceptional corrosion resistance across all batches of Womic Steel’s316 and 316LSeamless Steel Pipe.

Womic Steel utilizes state-of-the-art manufacturing technology to ensure every316 and 316LWelded Stainless Steel Pipe meets precise specifications and delivers excellent surface quality and performance.

1. Raw Material Selection:High-quality316 and 316Lstainless steel strips/coils from certified suppliers (e.g., Baosteel, TISCO, POSCO).

2. Slitting & Uncoiling:The steel coil is slit to the required width and uncoiled for feeding into the forming mill.

3. Forming & Welding:The strip is progressively formed into a cylindrical shape and the edges are welded together using advanced TIG or Plasma welding techniques to create a solid weld seam.

4. Weld Seam Treatment:The external weld bead is removed to achieve a smooth surface, and the internal bead may be controlled or treated for bore cleanliness.

5. Solution Annealing:A full heat treatment process is applied to dissolve carbides, restore corrosion resistance, and relieve stresses from welding and forming.

6. Sizing & Calibration:The pipe is passed through a sizing mill to achieve the final precise outer diameter and roundness.

7. Straightening:The pipe is straightened to ensure optimal linearity.

8. Pickling & Passivation:Chemical treatment removes scale and impurities, while promoting the formation of a protective passive oxide layer on the surface, including the weld zone.

9. Non-Destructive Testing (NDT):The weld seam is inspected using methods like Eddy Current or Ultrasonic Testing to ensure integrity and quality.

10. Final Inspection & Marking:Each pipe undergoes dimensional checks, visual inspection, and is marked with grade, heat number, and relevant standards before packaging.

This controlled process guarantees a consistent weld seam, excellent dimensional accuracy, and superior corrosion resistance for every batch of Womic Steel's316 and 316LWelded Steel Pipes.

Outside Diameter:6mm – 1219mm (1/4" – 48")

Wall Thickness:0.5mm – 50mm (SCH 5S – SCH XXS)

Length:Up to 12m(fixed or random)

Tolerances:According to ASTM A999 / EN ISO 1127

Womic Steel offers a wide range of surface finishes to meet various industrial, sanitary, and decorative applications.

Each 316 and 316L Stainless Steel Pipe surface is inspected for uniform gloss, absence of pits, and consistent finish quality.

Every316 and 316L Stainless Steel Pipeundergoes comprehensive inspection in accordance with ASTM, EN, and GB standards to guarantee reliability and performance:

• Visual & Dimensional Inspection:Surface, roundness, and thickness checked.
• Hydrostatic Pressure Test:100% tested for leakage and pressure resistance.
• Eddy Current Test:Detects surface and sub-surface imperfections.
• Ultrasonic Test (UT):Ensures internal integrity of the seamless structure.
• Positive Material Identification (PMI):Confirms correct chemical grade of 304L  Stainless Steel Pipe.
• Intergranular Corrosion Test (IGC):Validates resistance to sensitization.
• Flattening & Flaring Tests:Evaluate ductility and deformation capability.
• Hardness & Tensile Testing:Confirms mechanical compliance with ASTM standards.
• Surface Roughness and Cleanliness Check:For sanitary or polished tubes.
• Third-Party Inspection (SGS / BV / TUV):Available upon customer request.

These extensive tests ensure that every 316 and 316L Stainless Steel Pipe from Womic Steel meets the highest international standards for reliability and longevity.

316 and 316L Stainless Steel Pipe is ideal for a wide variety of industries, offering long service life and corrosion resistance in demanding conditions:

• 316 and 316L Stainless Steel Pipe for Chemical and Petrochemical Industry:Process piping, acid-resistant lines.
• 316 and 316L Stainless Steel Pipe for Food and Beverage Industry:Sanitary systems, liquid transfer, brewing pipelines.
• 316 and 316L Stainless Steel Pipe for Pharmaceutical Equipment:Clean piping, sterile environments.
• 316 and 316L Stainless Steel Pipe for Heat Exchanger Tubes:Boilers, condensers, and evaporators.
• 316 and 316L Stainless Steel Pipe for Marine Engineering:Offshore pipelines, seawater systems, desalination, ballast piping (ship classification certifications available from ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK).
• 316 and 316L Stainless Steel Pipe for Construction and Decoration:Handrails, structural and architectural applications.
• 316 and 316L Stainless Steel Pipe for Water Treatment and Gas Systems:High-purity and corrosion-resistant pipelines.

Each316 and 316LStainless Steel Pipe is securely packed and clearly labeled to ensure safe and efficient transport worldwide.

General packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.

Hexagonal packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.

Packaging of welded pipe in medium and large sizes: Wrapped with woven fabric by automatic packaging for export sea-worthy transport.

Packaging for medium and large size welded pipes to be exported: Wooden or steel crate packaging for export sea-worthy transport.

General packaging for products to be exported: Wooden box for export sea-worthy transport.

Packaging of condensation pipe and low-pressure heater tube: Wooden box for local truck and export sea-worthy transport.

1. Direct cooperation with global shipowners ensures the most competitive freight rates.

2. Professional loading and securing teams guarantee damage-free shipment.

3. Efficient document preparation, minimizing customs delays.

4. Rapid delivery time — standard sizes kept in ready stock more than 10,000tons.

5. Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.

Womic Steel is a trusted manufacturer and exporter specializing in316 and 316L Stainless Steel Pipe,committed to delivering premium quality and professional service.

• Strict quality control under ISO and PED certification.
• Modern production lines and experienced technicians.
• Complete testing, inspection, and documentation support.
• Flexible customization and surface finishing options.
• Fast production cycle and reliable global shipping.