ASME B16.5 flanges

ASME B 16.5 Flanges - High-Performance Pipe Flanges for Critical Applications

Product Overview

Our ASME B16.5 flanges provide precision-engineered sealing solutions for high-pressure systems from NPS 1/2 through NPS 24. With 42 years of forging expertise, JS FITTINGS operates a 35,000 m² facility ensuring that every flange meets exact pressure-temperature ratings. From high-integrity Weld Neck to versatile Blind flanges, our components are ISO 9001 and CE certified, guaranteeing structural continuity and zero-leak performance in your most critical oil & gas or Power Generation projects

Key Features & Advantages

Automated Production Excellence

Our 100-meter automated painting lines ensure uniform coating thickness and corrosion resistance. This translates to extended service life and reduced maintenance costs for your installations.

Multi-Standard Compliance

Beyond ASME B 16.5 flanges, we manufacture to ANSI, GOST, EN, BS, SANS, DIN, and JIS standards. You get complete interchangeability and global supply chain flexibility.

Precision-Engineered Hub Design

Weld neck flanges feature tapered stress transitions that reduce fatigue failures. Slip-on and blind flanges maintain exact bore alignment for smooth flow characteristics.

Material Versatility

Carbon steel for general service, stainless steel for corrosive environments, and alloy steel for extreme temperature applications. Each material grade meets specific ASTM specifications.

Surface Treatment Options

Choose from sandblasting with anti-rust oil, water-based eco-friendly paint, or epoxy coating based on your environmental requirements.

Technical Specifications

 Standards & Certifications

All flanges strictly adhere to global standards:

· ASME B16.5 - Primary standard for NPS 1/2 through 24

· ASME B16.47 - Large bore flanges (NPS 26-60)

· EN 1092-1 - European metric flanges

· MSS SP-44 - Steel pipeline flanges

· API 605 - Large diameter carbon steel flanges

· JIS B2220 - Japanese industrial standard

· GOST Standards - CIS market compliance

Our ISO 9001:2015 quality management system ensures consistent dimensional accuracy and material traceability.

Chemical Composition & Mechanical Properties

Carbon Steel ASTM A105

· Carbon: 0.35% max

· Manganese: 0.60-1.05%

· Tensile Strength: 485 MPa min

· Yield Strength: 250 MPa min

Stainless Steel ASTM A182 F316

· Chromium: 16.0-18.0%

· Nickel: 10.0-14.0%

· Molybdenum: 2.0-3.0%

· Tensile Strength: 515 MPa min

· Yield Strength: 205 MPa min

Manufacturing Process

Our forging process begins with certified raw materials that undergo spectroscopic analysis. Heat treatment in controlled atmospheres achieves optimal grain structure and mechanical properties. CNC machining ensures precise dimensional tolerances within ASME B 16.5 flange requirements. Final inspection includes pressure testing, dimensional verification, and surface quality assessment.

Surface Finish & Coating Options

Standard Finishes:

· Sandblasting to Sa2.5 grade removes mill scale and contaminants

· Anti-rust oil provides temporary corrosion protection during storage

· Water-based eco-friendly paint offers long-term outdoor protection

Premium Coatings:

· Epoxy coating for Chemical resistance

· Hot-dip galvanizing for marine environments

· Specialized coatings for food grade applications

Applications

Your ASME B 16.5 flanges perform reliably in:

· Oil & Gas Processing - Upstream, midstream, and downstream operations

· Chemical Plants - Process piping for corrosive media

· Power Generation - Steam lines and cooling water systems

· Shipbuilding - Marine piping systems

· Water Treatment - Municipal and industrial facilities

· HVAC Systems - Commercial building infrastructure

Packaging & Delivery

We protect your flanges with wooden boxes for sea shipment and cartons for air freight. Plastic caps seal flange faces during transport. Our dedicated logistics network handles 30,000+ tons annually with timely global deliveries. You receive tracking information and shipping documentation for complete visibility.

Customization Service

Special bore sizes, non-standard materials, and custom face finishes are available. Our engineering team provides technical support for unique applications. Prototype development and small batch production accommodate your project timeline requirements.

Quality Control

Every flange undergoes:

Dimensional Inspection: Verified by precision calipers and CMM.

Surface Finish: 100% visual check for serration quality (125-250 Ra).

Traceability: Permanent ard-stamped heat numbers.

Documentation: Mill Test Certificates to EN 10204 3.1 included."

Our quality documentation includes mill test certificates, dimensional reports, and compliance statements.

Certificates

Our products are backed by industry-recognized certifications:

• ISO 9001:2015 Quality Management System
• CE (Pressure Equipment Directive)
• GOST-R for Russian market compliance
• Material Test Certificates (MTCs) provided for all products
• Additional certifications available upon request

Customer Reviews

"We tested the elbows and 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 have been consistently impressed with the service provided by JS FITTINGS, particularly their efficient production and fast delivery times."

FAQ

Q: What's the difference between ASME B 16.5 and B 16.47 flanges?

A: ASME B 16.5 covers flanges up to NPS 24. For sizes NPS 26 through NPS 60, use ASME B 16.47 Series A & B.

Q: Can Slip-On flanges handle high-fatigue applications?

A: Weld Neck flanges are recommended for critical applications due to their tapered hub design that reduces stress concentration.

Q: How do I select the correct pressure class?

A: Choose based on your system's pressure-temperature rating. If operating conditions exceed Class 150 limits, upgrade to Class 300 or higher.

Q: Are these flanges compatible with metric systems?

A: ASME flanges use imperial dimensions. For metric compatibility, consider EN 1092-1 flanges or custom adapter solutions.

Contact Us

Get your ASME B 16.5 flange quote today. Email us at admin@jsfittings.com  for technical specifications and pricing.