316/316L Lined Stainless Steel Pipes

Cost-Effective Corrosion Protection:

 Combines low-cost carbon steel base pipe with 316/316L stainless steel lining, reducing material cost by 40-60% compared to solid stainless steel pipe.

Excellent Corrosion Resistance: 

316/316L internal lining provides outstanding resistance to pitting, crevice corrosion, and chloride attack in aggressive media, thanks to 2-3% molybdenum content.

High Mechanical Strength: 

Carbon steel or alloy steel base pipe provides excellent structural strength, pressure ratings, and temperature resistance.

Metallurgical Bonding: 

Advanced manufacturing processes ensure strong metallurgical bond between lining and base pipe, preventing liner collapse or separation during service.

Smooth Internal Surface: 

316/316L lining provides smooth, low-friction surface for improved flow efficiency and reduced fouling.

Weldable End Preparation: 

Available with weld overlay transition (butter layer) at pipe ends for field welding without corrosion exposure at welds.

Full Range of Sizes: 

Available from 2″ to 60″ (DN50 to DN1500) with lining thickness from 2mm to 6mm.

Pressure Ratings: 

Suitable for ANSI Class 150 to Class 2500 pressure ratings based on base pipe selection.

Temperature Range: 

Suitable for -29°C to 400°C (-20°F to 752°F) depending on lining and base material.

International Certifications: 

Lined pipes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with ASTM, ASME, and API standards.

The lower carbon content in 316L lining minimizes carbide precipitation during welding, providing enhanced resistance to intergranular corrosion, especially in welded service environments.

Base Pipe Preparation: Carbon steel or alloy steel base pipe is cleaned, inspected, and prepared for lining application.

Lining Tube Fabrication: 316/316L stainless steel sheet is rolled and welded into a tube slightly smaller than the base pipe ID.

Lining Insertion: The 316/316L lining tube is inserted into the base pipe.

Hydraulic Expansion: High-pressure water (up to 5000 psi) expands the lining tube against the base pipe inner wall, creating a tight mechanical bond.

Weld Overlay (Butter Layer): Pipe ends are prepared with stainless steel weld overlay (butter layer) to prevent corrosion at field welds.

Hydrostatic Testing: Each lined pipe is hydrostatically tested to verify bond integrity and pressure rating.

NDT Inspection: Ultrasonic testing (UT) and eddy current testing (ECT) verify lining thickness and bond quality.

End Finishing: Pipe ends are beveled and prepared for field welding.

Marking & Coating: Pipes are marked with grade, size, lining thickness, heat number, and standard. External coating applied upon request.

Base Pipe Inspection: Chemical analysis, mechanical testing, dimensional check per ASTM A106/A53/API 5L.

Lining Material Verification: PMI 100% for 316/316L lining material – verification of Cr, Ni, Mo.

Bond Integrity Testing: Ultrasonic test (UT) to verify metallurgical/mechanical bond between lining and base pipe.

Lining Thickness Check: Ultrasonic thickness measurement at multiple points.

Hydrostatic Test: Each pipe tested at 1.5× design pressure.

Visual Inspection: Internal and external surface inspection.

Dimensional Check: OD, ID, wall thickness, length, straightness.

Intergranular Corrosion Test: ASTM A262 Practice E for 316L lining (upon request).

Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available upon customer request.

Chemical Processing: Corrosive chemical transfer lines, acid piping systems, reactor feed lines, waste acid lines.

Oil & Gas (Sour Service): Sour gas pipelines, produced water lines, CO₂ injection lines (NACE MR0175 compliant).

Water Treatment: Seawater intake lines, brine lines, desalination plant piping, wastewater treatment.

Marine Applications: Shipboard seawater systems, ballast water lines, cooling water piping (ABS/BV/DNV/LR certified).

Power Generation: Cooling water lines, flue gas desulfurization (FGD) piping, condenser water lines.

Mining & Mineral Processing: Slurry lines, acid leach lines, tailings lines.

Pharmaceutical: High-purity water lines, clean steam lines (electropolished lining option).

Food & Beverage: Process water lines, CIP supply lines, product transfer lines (sanitary finish option).

1. What is the difference between lined pipe and clad pipe?
Lined pipe uses a mechanically bonded stainless steel liner (2-6mm) inserted into carbon steel pipe. Clad pipe uses metallurgically bonded stainless steel plate (0.5-3mm) rolled and welded. Lined pipe is more economical for larger diameters; clad pipe offers stronger bond suitable for forming and bending.

2. Can lined pipes be welded in the field?
Yes, with proper weld overlay (buttering) at pipe ends. The weld overlay provides a transition layer allowing welding between carbon steel base pipes while maintaining corrosion resistance at the weld joint.

3. What is the maximum temperature for lined pipes?
400°C (752°F) for base pipe A106 Gr B with 316/316L lining. Higher temperatures require alloy steel base pipe (A335 P11/P22) with appropriate lining material.

4. Are lined pipes suitable for sour service (H₂S)?
Yes, with proper base pipe selection (API 5L X52/X65 with hardness control) and NACE MR0175 compliant lining. Full documentation including HIC/SSC test reports available upon request.

5. What lining thickness is recommended for seawater service?
Minimum 3mm 316L lining for continuous seawater service. For high-velocity or turbulent seawater, 4-5mm lining thickness is recommended.

6. How is the bond between lining and base pipe verified?
Ultrasonic testing (UT) is used to verify bond integrity. 100% of the pipe length is tested to ensure no voids or delamination between lining and base pipe.

Cost-Effective Solution: 40-60% cost savings compared to solid stainless steel pipe

Complete Size Range: 2″ to 60″ (DN50 to DN1500) – all standard sizes available

Multiple Base Pipe Grades: A106 Gr B, API 5L X42-X65, A333 Gr 6, A335 P11/P22

Lining Thickness Options: 2mm to 6mm – tailored to your service severity

Weld Overlay Ready: Pipe ends prepared with stainless steel butter layer for field welding

Full Traceability: Heat number on each pipe – traceable to original mill certificate

NACE MR0175 Compliant: Full documentation for sour service applications

Marine Certified: ABS, BV, DNV, LR certifications available

Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available

Global Delivery: Exported to major oil & gas, chemical, and marine projects worldwide

Website: www.womicstainless.com

E-mail: info@womicstainless.com

Tel / WhatsApp / WeChat:

Victor: +86 15575100681

Jack: +86 18390957568

Womic Steel – Your reliable partner for high‑quality stainless steel products, precision machined components, and custom solutions for corrosion‑resistant applications.

Stock Examples (316L Lined Pipes – A106 Gr B Base – 3mm Lining – Weld Overlay Ends):

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