✅ Stainless Steel Plate Flat Welding Flange – High Performance Industrial Flanges

SSM supplies premium quality Plate Flat Welding Flanges (PL Flanges), designed for reliable pipe connections, easy installation, and cost-effective flange solutions in industrial piping, chemical, water treatment, marine, oil & gas, and process systems.

Manufactured from high-quality carbon steel, stainless steel, and alloy steel materials, these flat welding flanges provide excellent mechanical strength, stable sealing performance, and long service life in various operating environments. The plate flat welding flange is directly welded to the pipe end, offering a simple structure, convenient fabrication, and economical solution for general pressure piping applications.

With precise machining, strict dimensional control, and high-quality surface finishing, Plate Flat Welding Flanges ensure reliable connections between pipes, valves, pumps, and equipment while meeting international flange standards and customer requirements.

✅ Product Overview

A Plate Flat Welding Flange (also known as Plate Flange / Flat Face Slip-On Welding Flange) is a commonly used pipe flange manufactured from a flat steel plate. It is connected to the pipe through fillet welding around the pipe outside diameter.

Compared with welding neck flanges, plate flat welding flanges feature a simpler design and lower manufacturing cost. They are widely used in low and medium pressure piping systems where easy installation, maintenance convenience, and economic efficiency are required.

✅ Key Features

Product Type:
Plate Flat Welding Flange / Flat Face Plate Flange / PL Flange

Material:
Carbon Steel: ASTM A105 / A350 LF2
Stainless Steel: ASTM A182 F304 / F304L / F316 / F316L
Alloy Steel: ASTM A182 F5 / F11 / F22 (Available Options)

Standard:
ASME B16.5 / ASME B16.47 / EN 1092-1 / DIN / JIS / GOST / Custom Standards

Facing Type:
Flat Face (FF) / Raised Face (RF) (Optional)

Connection Type:
Plate Welding Connection

Manufacturing Process:
Steel Plate Cutting / Forging / Machining

Surface Finish:
Anti-Rust Oil / Black Painting / Galvanized / Pickled & Passivated

Size Range:
1/2" – 60" (DN15 – DN1500)
(Custom Sizes Available)

Pressure Rating:
Class 150 – Class 600
PN6 – PN40 (According to Standard and Size)

⚙️ Advantages

✅ Simple Structure and Easy Installation

The plate flat welding flange has a simple design and can be easily welded onto the pipe, reducing installation time and fabrication costs.

✅ Cost-Effective Solution

Compared with welding neck and forged flanges, plate flanges require less material and simpler manufacturing processes, making them an economical choice for general piping systems.

✅ Reliable Mechanical Strength

High-quality steel materials provide excellent load-bearing capacity, dimensional stability, and long service life under normal operating conditions.

✅ Easy Alignment and Maintenance

The flat flange design allows convenient pipe alignment, bolt connection, inspection, and replacement during maintenance operations.

✅ Wide Material Availability

Available in carbon steel, stainless steel, and alloy steel materials to meet different temperature, pressure, and corrosion requirements.

✅ Flexible Surface and Facing Options

Available with different facing types, coatings, and machining finishes according to customer requirements and application conditions.

🔧 Typical Material Properties – Stainless Steel 316L

📋 Technical Specifications

✅ Applications

Oil & Gas Industry

Used in pipeline systems, storage facilities, refineries, and auxiliary process piping where reliable flange connections are required.

Chemical Processing Plants

Suitable for general chemical pipelines, equipment connections, and fluid transportation systems.

Water Treatment Systems

Widely applied in water supply pipelines, filtration systems, pumps, and industrial water equipment.

Marine Engineering

Used in shipbuilding, seawater piping, cooling systems, and offshore projects.

Power Generation Facilities

Applied in cooling water systems, utility pipelines, and general industrial piping.

Food & Beverage Processing

Stainless steel plate flanges are suitable for hygienic piping systems requiring corrosion resistance.

General Industrial Piping

Used for connecting pipes, valves, pumps, tanks, and mechanical equipment.

✅ Why Choose SSM

Over 30 years of experience in flange and pipe fitting manufacturing

Professional production according to ASME, ASTM, EN, DIN, and JIS standards

Complete material traceability with MTC / EN10204 3.1 certification

Supply of carbon steel, stainless steel, alloy steel, and special alloy flanges

Advanced cutting, forging, machining, and inspection capabilities

Customized sizes, drilling patterns, pressure classes, and facing types available

Strict quality control ensures dimensional accuracy and reliable performance

Reliable global supply capability with professional technical support

📩 Request A Quote

SSM can supply Plate Flat Welding Flanges in various materials, sizes, pressure ratings, drilling standards, and surface finishes to meet industrial piping and engineering project requirements.

Contact SSM today for pricing, technical datasheets, material certificates, and worldwide shipping solutions.

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