Manufacturing Standard Guide

ASME B16.11 Forged Fittings (Socket Weld & Threaded)

Comprehensive engineering guide and commercial product catalog for ASME B16.11 socket weld and NPT threaded forged fittings in Class 2000, 3000, 6000, and 9000.

Pressure Classes & Dimensional Scope (ASME B16.11 / BS 3799)

Class 2000

NPT Threaded fittings for medium pressure piping up to 2000 PSI.

Class 3000

Standard Socket Weld & Threaded fittings for heavy industrial plants.

Class 6000

Extra heavy pressure fittings for hydraulic systems and sour gas.

Class 9000

Extreme high-pressure forged fittings for critical power & subsea lines.

Nominal Pipe Size (NPS) Dimension Overview

NPS (Inches)Outside Dia (mm)Class 150 / 2000 RatingClass 300 / 3000 RatingClass 600 / 6000 Rating
1/2"21.3 mmSch 80 / Class 3000Class 3000 Socket WeldClass 6000 Socket Weld
3/4"26.7 mmSch 80 / Class 3000Class 3000 Socket WeldClass 6000 Socket Weld
1"33.4 mmSch 80 / Class 3000Class 3000 Socket WeldClass 6000 Socket Weld
2"60.3 mmSch 80 / Class 3000Class 3000 Socket WeldClass 6000 Socket Weld

Frequently Asked Questions (ASME B16.11 / BS 3799)

What fittings are covered under ASME B16.11?

ASME B16.11 covers forged 90° elbows, 45° elbows, tees, crosses, full & half couplings, caps, plugs, bushings, street elbows, and boss fittings.

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