ASME B16.11 Forged Steel Fittings

RAYOUNG is a premier manufacturer of high-pressure forged steel fittings compliant with ASME B16.11, BS3799, and MSS SP-83/95/97.

Unlike standard cast fittings, our forged components are engineered from solid carbon, stainless, or alloy steel billets through a precision hot-die forging process. This ensures a refined grain structure, eliminating internal porosity and providing maximum resistance to fatigue and high-pressure surges.
Designed for use in critical systems—including refinery high-pressure piping, chemical processing, and hydraulic lines—our steel pipe fittings are the preferred choice for global distributors requiring bulk, consistent, and certified supply.

ASME B16.11 is the international standard governing the dimensions, ratings, tolerances, and material requirements for socket-weld (SW) and threaded (NPT) forged steel pipe fittings. Used in high-pressure, high-temperature industrial piping systems, these fittings range in size from NPS 1/8 to 4 and are machined from solid forged steel stock for exceptional structural strength.

Key Specifications & Ratings

The ASME B16.11 standard categorizes forged fittings into specific pressure-temperature ratings known as “Classes.” The rating directly corresponds to the wall thickness of the connected piping schedule.

Pressure Classes:

Threaded fittings are designated as Class 2000, 3000, and 6000. Socket-weld fittings are designated as Class 3000, 6000, and 9000.
Pipe Schedule Matching:

• Class 3000: Typically used with Schedule 80 / Extra Strong (XS) pipes.
• Class 6000: Used in heavier, high-pressure Schedule 160 pipes.
• Class 9000: Reserved for extremely thick Double Extra Strong (XXS) pipe walls.

Comprehensive Product Configuration

We provide the full range of forged fittings in both Socket Weld (SW) and Threaded (NPT/BSPT) end connections:

• 90° & 45° Elbows: Precision-angled for smooth directional changes.

• Tees & Crosses: Equal and Reducing configurations for flow distribution.

• Caps: Including Hex Head, Square Head, and Round Head Plugs.

• Bushings: Hex Head Bushings for seamless diameter reduction.

• Street Elbows: Male-to-female threaded connections for space-restricted areas.

Technical Specifications

Pressure Ratings & Classifications

Our steel pipe fittings are categorized by their pressure-temperature ratings to ensure safety in diverse industrial environments:

• Threaded Fittings: Class 2000, 3000, and 6000.

• Socket Weld Fittings: Class 3000, 6000, and 9000.

Size Range

• Nominal Size: 1/8″ to 4″ (DN6 to DN100).

• Wall Thickness: Corresponding to SCH 80, 160, and XXS piping systems.

Threading Standards

We utilize high-precision CNC threading to ensure leak-proof seals:

• NPT (National Pipe Thread): Conforming to ASME B1.20.1.

• BSPT / Din 2999: For European and Commonwealth project requirements.

Material Grades & Compliance

All materials are supplied with EN 10204 3.1 Certification and are available in NACE MR0175/ISO 15156 compliance for sour service.