ASME B16.5 flange

ASME B16.5 Flange - Professional Industrial Piping Solutions

Product Overview

JS FITTING's ASME B16.5 flange delivers precision-engineered solutions for critical piping connections across sizes NPS 1/2 through NPS 24 and pressure classes 150-2500. Our flanges solve three core industry challenges: eliminating connection incompatibility between global suppliers, preventing catastrophic leakage in high-pressure systems, and ensuring material compliance clarity. With 42 years of manufacturing expertise and 30,000 tons annual capacity, you receive guaranteed dimensional accuracy, verified pressure-temperature ratings, and complete material traceability through heat number marking for safety audits.

Key Features & Advantages

100% Forged Integrity
Unlike cast alternatives, our flanges are hot-forged to ensure a dense, uniform grain structure that eliminates internal porosity and guarantees performance in high-stress, high-pressure environments.

Global Compliance & Interchangeability
Precision-machined bolt patterns and dimensional accuracy per ASME B16.5 ensure seamless integration with valves, pumps, and pipes from any global supplier.

Precision Manufacturing Standards

· Controlled dimensional tolerances per ASME B16.5 specifications

· Uniform wall thickness distribution for consistent pressure containment

· Machine-finished facing surfaces for optimal gasket sealing

Material Traceability System

· Heat number marking on every flange for complete material pedigree

· MTR documentation linking back to original steel ladle analysis

· Full compliance with safety and insurance audit requirements

Automated Production Quality

· 100-meter automated painting lines ensure consistent coating thickness

· Eco-friendly sandblasting systems create optimal surface preparation

· Four advanced production lines maintain quality consistency

Technical Specifications

 Standards & Certifications

Our flanges comply with multiple international standards:

· ASME B16.5 / B16.47 (Primary Standard)

· EN 1092-1 (DIN Compatibility)

· MSS SP-44 / API 605

· JIS B2220 (Japanese Industrial Standard)

· GOST Standards (CIS Markets)

Quality certifications include ISO 9001, CE, and PETROBRAS validation.

Chemical Composition & Mechanical Properties

ASTM A105/A105N: Ambient to High-Temperature service (-29°C to 427°C).

ASTM A350 LF2: Low-Temperature service down to -46°C, crucial for cold climates and cryogenic gas terminals.

ASTM A182 F316L: Superior acid and pitting corrosion resistance for Chemical processing.

Carbon Steel (ASTM A105)

· General industrial applications with standard pressure requirements

· Temperature range: -29°C to +427°C

Stainless Steel (ASTM A182 F304/F316)

· Corrosion-resistant applications in chemical processing

· Superior performance in high-purity environments

Alloy Steel (ASTM A694 F42-F70)

Standard Carbon Steel: ASTM A105

Low-Temperature Carbon Steel: ASTM A350 LF2 Class 1 & 2

High-Yield Steel (Pipeline): ASTM A694 F42-F70

· High-pressure and low-temperature performance

· Enhanced strength for demanding applications

Duplex Steel (ASTM A182 F51/F53/F55)

· Extreme environment resistance with superior mechanical properties

Manufacturing Process

Our controlled manufacturing process ensures consistent quality:

1. Material Verification - Incoming inspection with PMI testing

2. Precision Forging - Controlled grain flow for structural integrity

3. Heat Treatment - Normalized stress relief for dimensional stability

4. Machining - CNC-controlled facing and bolt hole precision

5. Surface Preparation - Automated sandblasting for coating adhesion

6. Final Inspection - Dimensional verification and pressure testing

Surface Finish & Coating Options

Standard Finishes

· Sandblasted + anti-rust oil protection

· Water-based eco-friendly paint coating

· Hot-dip galvanizing for corrosion resistance

Premium Coatings

· Epoxy coating for chemical resistance

· Zinc-rich primer systems for marine environments

· Custom coating specifications per project requirements

Applications

Offshore Oil & Gas Platforms

Class 900-1500 RTJ flanges in duplex steel provide wellhead connection integrity against high-pressure hydrocarbons and saltwater corrosion.

Chemical Processing Plants

Class 150-300 flanges in Hastelloy or Inconel prevent fugitive emissions in reactor vessels handling aggressive acids and thermal cycling.

Power Generation

Class 2500 chrome-moly flanges withstand creep rupture at temperatures exceeding 500°C in supercritical steam applications.

Packaging & Delivery

Protective Packaging

· Individual flange wrapping prevents surface damage

· Wooden crates for international shipping protection

· Moisture barrier packaging for long-term storage

Global Logistics Network

· 30,000+ tons annual capacity ensures stock availability

· Dedicated shipping partnerships for timely delivery

· Express shipping options for urgent requirements

Customization Service

We accommodate special project requirements:

· Non-standard dimensions within ASME B16.5 framework

· Special material grades for unique applications

· Custom face finishes for specific gasket requirements

· Project-specific marking and documentation

Quality Control

Inspection Protocol

· Dimensional verification per ASME B16.5 requirements

· PMI testing confirms material composition

· Hydrostatic pressure testing validates integrity

· Surface finish measurement ensures coating compliance

Documentation Package

· Material Test Reports (MTR) with chemical analysis

· Dimensional inspection certificates

· Pressure test certificates

· Third-party inspection available upon request

Certificates

Our products come with comprehensive certification:

• ISO 9001:2015
• CE Marking
• GOST-R
• API 6A
• PED 2014/68/EU

We provide full material traceability and test reports with every order.

Customer Reviews

"We tested the flanges, their performance is very nice. We will make the new purchase plan for the warehouse."

"The flanges are exactly in line with our requirement technically and competitive commercially."

"I am extremely impressed with the level of professionalism and efficiency displayed by the JS FITTINGS team. Their technical knowledge and expertise have been instrumental in our projects."

"JS FITTINGS completed the production ahead of schedule. The delivery was earlier than anticipated, which greatly helped in keeping our project timeline on track."

FAQ

Q: What is the difference between ASME B16.5 flange and ASME B16.47?

A: Size coverage. ASME B16.5 handles sizes up to NPS 24. For flanges NPS 26 through NPS 60, ASME B16.47 Series A & B governs.

Q: Can I mate a Class 150 with a Class 300 flange?

A: No. Different bolt circle diameters and bolt quantities prevent assembly. Pressure rating incompatibility creates safety hazards.

Q: Why is heat number marking crucial?

A: Heat numbers provide complete traceability to original steel ladle analysis and MTR documentation for safety and insurance audits.

Q: When should I choose RTJ over RF facing?

A: RTJ is recommended for Class 600 and above, or high-temperature services (>400°C), using metal gaskets that seal tighter under pressure.

Q: How does temperature affect pressure ratings?

A: Pressure ratings decrease as operating temperature rises. Consult ASME B16.5 pressure-temperature tables for specific derating values.

Q: Do you provide Normalized (A105N) flanges?

A: Yes, for applications requiring higher notch toughness, we provide heat-treated Normalized A105N flanges with certified test results."

Contact Us

Get professional ASME B16.5 Flange solutions today. Email: admin@jsfittings.com mailto:admin@jsfittings.com for technical support and quotes.