Which standards do Cangrun pipe fittings and flanges comply with?

Butt-weld fittings are produced to JIS B2311/B2312/B2313, GB/T 12459, GB/T 13401, GB/T 10752, SH/T 3408, SY/T 0609 and HG/T 21635 in ASTM/ASME A234 and A403 materials. Flanges are supplied in American series Class 150 to Class 2500 and European series PN2.5 to PN400.

What is your manufacturing size range?

Seamless fittings from 1/2 to 24 inch (DN15–DN600), welded fittings from 4 to 78 inch (DN150–DN1900) with wall thickness up to 150 mm, and weld neck flanges up to 160 inch (DN4000).

Which materials are available?

Carbon steel ASTM/ASME A234 WPB, WPC and ST37; alloy steel ST52, 12CrMo, 15CrMo, WP1–WP12, WP11–WP22, WP5, WP91 and WP911; stainless steel ASTM/ASME A403 WP304, 304L, 304H, 304LN, 304N, 316, 316L and 316Ti.

Which flange facing types can you supply?

Flat Face (FF), Raised Face (RF), Groove (G), Male/Female (MFM) and Ring Type Joint (RJ), depending on flange type and pressure class.

Which industries use your products?

Electric power, petrochemical, chemical, pharmaceutical, boiler, heating and shipbuilding projects, supplied to contractors and distributors worldwide.

How can I receive a full product catalog?

Use the Request a Catalog page or contact our export team at Bryan@crpipes.com with your product, size, schedule, material and standard requirements.

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Famous High Quality Flanges Manufacturers, Company

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Product Description

Flanges are critical components for secure, leak-free connections in complex industrial piping systems. As a leading flange manufacturer and supplier, we are committed to providing a comprehensive range of flange products that meet international standards, demonstrate superior craftsmanship, and offer reliable quality to the global oil and gas, chemical, hydropower, shipbuilding, and construction industries. Regardless of your project requirements, we offer the perfect connection solution.

Our Flange Product Range: Meeting Your Every Need

Our extensive inventory and flexible production line offer a wide range of flange types, sizes, and materials, ensuring fast delivery.

1. Classification by Type

Weld Neck Flange

The preferred choice for high-strength connections, particularly suitable for high-pressure, high-temperature, or low-temperature applications, effectively reducing stress concentrations.

Blind Flange

Used to seal the ends of piping systems, facilitating system maintenance, pressure testing, and future expansion.

Threaded Flange

Connects to the pipe via threads, eliminating the need for welding and simplifying installation, making it suitable for applications where welding is not permitted.

Slip-On Flange

Slips onto the pipe and then welded. This is cost-effective, easy to install and align, and suitable for low-pressure applications.

Lap Joint Flange

Used in conjunction with pipe fittings, it facilitates system alignment and disassembly and is often used for pipelines requiring frequent maintenance.

Socket Weld Flange

Sockets are welded after the pipe is inserted into the socket, providing a smooth fluid path and strong joint strength.

2. Classification by Material

Stainless Steel Flanges: 304, 304L, 316, 316L, 321, 310S, etc., offer excellent corrosion resistance and high-temperature resistance.
Carbon Steel Flanges: A105, A350 LF2, Q235, etc., offer excellent strength and toughness, suitable for a variety of industrial environments.
Alloy Steel Flanges: ASTM A182 F11, F22, F91, etc., are used in extreme high-temperature and high-pressure conditions.
Duplex/Super Duplex Steel Flanges: 2205 and 2507, offering exceptional strength and corrosion resistance.
Other Special Materials: Flanges made of copper, aluminum, titanium, and nickel-based alloys (Hastelloy, Monel) are available upon request.

3. Classification by Standard and Pressure Rating

International Standards

ANSI/ASME B16.5, B16.47, DIN, EN1092-1, JIS B2220, GOST, AWWA, etc.

Pressure Ratings

Class 150, 300, 600, 900, 1500, 2500 (American Standard) / PN6, PN10, PN16, PN25, PN40, PN64 (European Standard).

Why Choose Us?

Superior Quality Control

From raw material procurement to finished product, every flange undergoes rigorous dimensional inspection, material chemical analysis, mechanical property testing, and non-destructive testing (UT, MT, PT) to ensure full compliance with standard specifications.

Advanced Manufacturing Capabilities

Our state-of-the-art forging, casting, machining, and heat treatment equipment ensure product consistency and reliability.

Customized Solutions

We offer custom flanges with non-standard dimensions, special materials, or special coatings/platings to meet your unique engineering needs.

Competitive Pricing

Leveraging our large-scale production and efficient supply chain management, we offer highly competitive pricing without sacrificing quality.

Global Delivery and Support

Our efficient logistics network ensures timely delivery of our products, regardless of your location. Our technical support team is always available to provide selection guidance and after-sales support.

Application Industries

Oil and gas (upstream, refining, pipelines)

Chemical and petrochemical processing

Power plants (thermal, nuclear, hydro)

Marine and offshore engineering

Water and wastewater treatment

Pulp, paper, and pharmaceuticals

Buildings and HVAC systems

Mila

Frequently Asked Questions (FAQ)

Q1 What types of industrial flanges do you supply?

We supply a complete range of flanges including Weld Neck, Blind, Threaded, Slip-On, Lap Joint, and Socket Weld flanges suitable for various industrial applications.

Q2 What materials are available for your flange manufacturing?

We offer flanges in Stainless Steel (304, 316L, 321, 310S), Carbon Steel (A105, Q235, A350 LF2), Alloy Steel (F11, F22, F91), Duplex/Super Duplex Steel (2205, 2507), as well as special materials like copper, aluminum, titanium, and nickel alloys.

Q3 Which international standards and pressure ratings do your products support?

Our flanges conform to international standards such as ANSI/ASME (B16.5, B16.47), DIN, EN1092-1, JIS B2220, GOST, and AWWA. Pressure ratings cover Class 150 to Class 2500, and PN6 to PN64.

Q4 Do you provide custom flange manufacturing?

Yes, we specialize in customized flange solutions featuring non-standard dimensions, special grade materials, or custom surface coatings and platings tailored to specific project requirements.

Q5 How do you ensure flange product quality?

Every product undergoes comprehensive quality control including chemical analysis, mechanical property testing, precise dimensional checks, and non-destructive testing methods (UT, MT, PT) before delivery.

Q6 What main industries use your flange connection solutions?

Our flanges are extensively used in oil and gas extraction & refining, chemical processing, thermal/nuclear/hydro power generation, marine engineering, water treatment, pharmaceutical, and HVAC construction.