Cl Resistance 316L Stainless Steel Flange Ring Corrosion Resistant Anti Pitting

Corrosion Resistant Stainless Steel Flange Rings (Cl⁻ Resistance) 316L Stainless Steel Custom Anti Pitting Design

1,Product Overview

Our 316L Stainless Steel Flange Rings are engineered for extreme environments where chloride-induced corrosionand pitting resistance are critical.

2,Features & Specifications

1. Advanced Material Properties

Material: 316L Stainless Steel (Low Carbon, High Molybdenum Content)

Composition: Cr 16-18%, Ni 10-14%, Mo 2-3%, C ≤0.03%

Corrosion Resistance:

Chloride Resistance: Withstands >1,000 ppm Cl⁻ (ASTM G48 Method A Testing).

Pitting Resistance Equivalent (PRE): ≥35 (Calculated as %Cr + 3.3×%Mo + 16×%N).

Mechanical Properties:

Tensile Strength: ≥485 MPa | Yield Strength: ≥170 MPa | Hardness: ≤217 HB.

Certifications: ASTM A240, NACE MR0175, PED 2014/68/EU.

2. Precision Engineering

Design Flexibility: Customizable bolt patterns, facings (RF/FF/RTJ), and non-circular profiles.

Dimensional Accuracy:

Bolt Hole Positioning: ±0.3mm | Outer Diameter: ±1.0mm.

Surface Treatment:

Electro-polishing (Ra ≤0.4μm) or Passivation (ASTM A967) for enhanced corrosion barrier.

Pressure Rating: Class 150 to Class 2500 (ASME B16.5/EN 1092-1).

3. Technical Specifications

Size Range: 1/2" to 36" nominal bore (Custom sizes available).

Temperature Range: -196°C to 800°C (Cryogenic to high-temperature compatible).

Interoperability: Compatible with ASTM A182 F316L forgings for welded assemblies.

3,Advantages

✅ Chloride Resistance

316L’s molybdenum-enriched matrix prevents pitting and crevice corrosion in seawater, brine injectors, and acidic media.

✅ Zero Post-Weld Degradation

Low carbon content (<0.03%) eliminates carbide precipitation during welding, ensuring intergranular corrosion resistance.

✅ Hybrid Manufacturing

Cold Forming/Welding: Retain material integrity without thermal distortion.

5-Axis CNC Machining: Achieve complex geometries and tight tolerances.

✅ Full Traceability

Mill Test Reports (MTRs) with heat number tracking.

100% PT (Dye Penetrant) and PMI (Positive Material Identification) testing.

4,Applications

Offshore & Marine: Subsea pipelines, seawater cooling systems, shipboard fittings.

Chemical Processing: Chlor-alkali reactors, acid storage tanks, bleach production.

Desalination Plants: Reverse osmosis (RO) modules, brine discharge flanges.

Pharmaceutical: CIP/SIP systems, high-purity fluid transfer.

Oil & Gas: H₂S/CO₂-laden wellheads, LNG cryogenic piping.

5,Manufacturing Process

1. Material Selection:316L steel sourced from ISO-certified mills

2. Forming:Cold rolling/pressing or TIG welding (for large sizes).

3. Machining:5-axis CNC for bolt holes, grooves, and sealing faces. ±0.3mm positional accuracy.

4. Surface Treatment:Electro-polishing or nitric acid passivation.

5. Quality Control:PMI, PT/UT testing, 3D CMM for dimensional verification.

JimaFor provides professional R & D services and customized production of high - end components
Our main business specializes in the R & D and custom production of high - end metal components, catering to the needs of various industries and focusing on complex and challenging products.

Our Advantages
Our strength lies not only in the ability to manufacture and supply forgings, castings, and machined parts but also in our strong optimization and integration capabilities. We are able to integrate advanced manufacturing technologies from across China, providing customized solutions tailored to meet the unique needs of our customers.

Our Mission
By integrating advanced technologies and manufacturing resources, we are dedicated to addressing the following challenges for our customers: technical issues, sourcing, quality, lead time, and cost concerns.