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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Product Description

A Plate Weld Flange (PL Flange) is a flat, circular disc with bolt holes, designed to connect pipes, valves, pumps, and other equipment in piping systems. Unlike welding neck flanges (WN), plate flanges are simpler in design and welded directly to the pipe by fillet welding at the backside.

Key Features

Simple & Cost-Effective – Made from a flat plate, reducing material and machining costs.

Easy Installation – Requires only fillet welding (no beveling needed).

Wide Applications – Used in low/medium-pressure systems (water, air, oil, gas).

Multiple Standards – Complies with ASME B16.5, B16.47, EN 1092-1, DIN, JIS.

Material Options – Carbon steel (A105), stainless steel (SS304/SS316), alloy steel.

Common Types

Flat Face (FF) – For low-pressure applications.
Raised Face (RF) – Improves gasket sealing.
Customizable – Available in various thicknesses and coatings (galvanized, epoxy).

Typical Uses

Water & HVAC systems
Petrochemical & industrial pipelines
Food processing & pharmaceutical (stainless steel variants)

Plate weld flanges are ideal where cost efficiency matters, though they are not recommended for high-pressure/temperature services compared to WN flanges.

Mila

Frequently Asked Questions (FAQ)

What is a Plate Weld Flange (PL Flange)?

A Plate Weld Flange (PL Flange) is a flat circular ring with bolt holes that is attached to a pipe using fillet welds. It provides a simple and cost-effective connection method for piping systems.

How does a Plate Weld Flange differ from a Weld Neck Flange (WN)?

Plate flanges are flatter and simpler in design, joining to pipes via fillet welding without requiring pipe beveling. Weld Neck flanges feature a tapered hub that butt-welds to the pipe, making WN flanges better suited for high-pressure and high-temperature conditions.

What pressure ratings are suitable for PL Flanges?

PL Flanges are designed primarily for low to medium-pressure applications, such as standard HVAC, water distribution, and low-pressure utility lines.

What materials are PL Flanges available in?

They are commonly manufactured in Carbon Steel (such as ASTM A105), Stainless Steel (SS304, SS316 for food and pharma use), and various Alloy Steels with optional protective coatings like galvanizing or epoxy.

Which international standards do PL Flanges follow?

Plate Weld Flanges are produced in accordance with global piping standards, including ASME B16.5, ASME B16.47, EN 1092-1, DIN, and JIS specifications.