✅ Stainless Steel Weld Neck RTJ Flange – High Performance Industrial Pipe Flanges

SSM supplies premium quality Weld Neck RTJ Flanges (WN RTJ Flanges), designed for high-pressure, high-temperature, and critical service piping applications in oil & gas, petrochemical, power generation, chemical processing, and industrial systems.

Manufactured from high-quality carbon steel, stainless steel, and alloy steel materials, these flanges provide excellent mechanical strength, superior sealing performance, and long service life under demanding operating conditions. The weld neck design provides a strong butt-weld connection with the pipe, while the Ring Type Joint (RTJ) facing ensures reliable metal-to-metal sealing for high-pressure applications.

With precision forging, accurate machining, and strict dimensional control, RTJ Weld Neck Flanges deliver excellent stress distribution, leak-resistant performance, and dependable operation in critical piping systems.

✅ Product Overview

A Weld Neck RTJ Flange is a high-performance pipe flange featuring a long tapered hub and a Ring Type Joint groove machined into the flange face.

The tapered hub provides smooth stress transition between the flange and pipe, reducing stress concentration and improving fatigue resistance. The RTJ groove accommodates a metal ring gasket, creating a highly reliable seal suitable for extreme pressure and temperature conditions.

Compared with flat face or raised face flanges, RTJ weld neck flanges are commonly selected for applications requiring maximum sealing reliability, such as oil & gas pipelines, refineries, and high-pressure process systems.

✅ Key Features

Product Type:
Weld Neck RTJ Flange / WN RTJ Flange / Ring Type Joint Weld Neck Flange

Material:
Carbon Steel: ASTM A105 / A350 LF2
Stainless Steel: ASTM A182 F304 / F304L / F316 / F316L
Alloy Steel: ASTM A182 F5 / F11 / F22 / F91 (Available Options)

Standard:
ASME B16.5 / ASME B16.47 / API 6A / EN 1092-1 / DIN / JIS / Custom Standards

Facing Type:
RTJ (Ring Type Joint)

Connection Type:
Butt Weld Neck Connection

RTJ Groove Type:
Oval Ring Groove / Octagonal Ring Groove

Manufacturing Process:
Forging / Heat Treatment / CNC Machining

Pressure Rating:
Class 150 – Class 2500
API 6A Pressure Classes Available

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

Surface Finish:
Machined RTJ Groove / Anti-Rust Oil / Pickled & Passivated

⚙️ Advantages

✅ Superior High-Pressure Sealing Performance

The RTJ groove design uses metal ring gaskets to provide reliable metal-to-metal sealing, making it suitable for high-pressure and high-temperature applications.

✅ Excellent Stress Distribution

The tapered weld neck design provides smooth stress transfer between the flange and pipe, reducing turbulence and mechanical stress concentration.

✅ High Strength and Durability

Manufactured from forged materials with controlled heat treatment, providing excellent mechanical properties and long service life.

✅ Leak-Resistant Connection

The RTJ sealing structure provides enhanced leakage prevention compared with conventional flange facing types.

✅ Suitable for Severe Service Conditions

Designed for critical applications involving high pressure, high temperature, vibration, and corrosive environments.

✅ Wide Material Selection

Available in carbon steel, stainless steel, alloy steel, and special alloys to meet different service requirements.

🔧 Typical Material Properties – Stainless Steel 316L

📋 Technical Specifications

✅ Applications

Oil & Gas Industry

Widely used in upstream, midstream, and downstream applications including pipelines, refineries, offshore platforms, and pressure systems.

Petrochemical Plants

Suitable for high-pressure process piping, reactors, heat exchangers, and critical equipment connections.

Power Generation Facilities

Used in steam systems, high-temperature pipelines, and pressure equipment requiring reliable sealing performance.

Chemical Processing Industry

Applied in corrosive and high-pressure fluid transportation systems.

Offshore & Marine Engineering

Suitable for offshore platforms, subsea piping, and marine systems exposed to harsh environments.

Pressure Vessel Systems

Used for connecting pressure vessels, valves, pumps, and process equipment requiring high-integrity flange connections.

⚠️ Installation Notes

RTJ flanges must be used with compatible RTJ metal ring gaskets.

The RTJ groove surface should be protected from scratches or damage before installation.

Proper bolt tightening procedures are required to achieve reliable sealing performance.

Flange facing, pressure class, and gasket selection should match the piping system design requirements.

✅ Why Choose SSM

Over 30 years of experience in flange and pipe fitting manufacturing

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

Complete material traceability with MTC / EN10204 3.1 certification

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

Advanced forging, CNC machining, heat treatment, and inspection capabilities

Customized sizes, pressure ratings, RTJ groove dimensions, and drilling patterns available

Strict quality control ensures dimensional accuracy and sealing reliability

Reliable global supply capability with professional technical support

📩 Request A Quote

SSM can supply Weld Neck RTJ Flanges in various materials, sizes, pressure classes, RTJ groove types, and drilling standards to meet high-pressure and critical piping system requirements.

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

Hot Tags: stainless steel weld neck rtj flange – high performance industrial pipe flanges, China stainless steel weld neck rtj flange – high performance industrial pipe flanges manufacturers, suppliers, factory, Hastelloy Flanges, Incoloy Flanges, Inconel Flanges, nickel 200 flanges, nickel 201 flanges, spectacles flange