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Threaded & Socket Welded Steel Fittings - Pressure Classes vs. Schedules

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Pipe Schedule and Designation
Pressure Class2000300060009000
Threaded Fittings 80/XS 160 XXS  
Socket-welded Fittings   80/XS 160 XXS
  • Standard (STD), Extra Strong (XS) and Double Extra Strong (XXS)
  • Schedule - numbers assigned to different wall thickness of pipe (i.e. schedule 80)

Threaded fittings are available in pressure classes 2000, 3000 and 6000.

Socket-welded fittings are available in pressure classes 3000, 6000 and 9000.

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Related Topics

• Piping Codes and Standards

Piping and tubes codes and standards - ASME, ANSI, ASTM, AGA, API, AWWA, BS, ISO, DIN and more.

• Piping Systems

Calculate dimensions of pipes and tubes. Pressure drop calculations and head loss charts. Use of different piping materials. Insulation of pipes and tubes and heat loss diagrams.

Related Documents

ANSI Schedule 40 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.

ANSI Schedule 80 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for schedule 80 steel pipes.

ASTM D1785 and ASTM F441 - PVC and CPVC Pipes Schedule 40 & 80

Standard dimensions and weight of PVC - Polyvinyl Chloride - and CPVC - Chlorinated Polyvinyl Chloride.

ASTM International - Standards for Steel Pipes, Tubes and Fittings

The ASTM standards covers various types of steel pipes, tubes and fittings for high-temperature services, ordinary use and special applications such as fire protection use

ISO - Pipe, Tube and Fittings Standards and Specifications

International Organization for Standardization - ISO - pipe, tube and fittings standards and specifications.

JIS - Pipe, Tube and Fittings Standards

Japanese industrial pipe, tube and fittings standards and specifications from the Japanese Standards Association - JAS.

Pipes - Nominal Wall Thickness

Nominal wall thickness of seamless and welded carbon and alloy steel pipes

Schedule - Terminology

Introduction to the schedule terminology of pipes.

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