what are asme standards

ASME standards are the piping standards which have to follow every epic company to design, construction and installation  of   projects. These  ASME codes and standard are below

ASME 31 code for pressure piping

ASME B31.1 – Power piping.
ASME B31.2 – Fuel Gas Piping.
ASME B31.3 – Process piping.
ASME B31.4 – Pipeline Transportation system for liquid hydrocarbon & other liquid.
ASME B31.5 – Refrigeration Piping.
ASME B31.8 – Gas transmission & distribution piping system.
ASME B31.9 – Building services piping.
ASME B31.11 – Slurry transportation piping system.

Different sections of ASME code

ASME section I : – Rules for construction of power boiler.
ASME Section II : – Materials.
Part A – Ferrous materials.
Part B – Non-Ferrous materials.
Part C – Specification for electrodes & filler wire.
Part D – Properties.
ASME Section IV : – Rules for construction of Heating Boiler.
ASME Section V : – Non- destructive Examination.
ASME Section VI : – Recommended rules for care & operation of heating boiler.
ASME Section VII : – Recommended guidelines for care of power boiler.
ASME Section VIII : – Rules for construction of pressure vessels.
(Division I & II)
ASME Section IX : – Welding & Brazing qualification.

ASME standards used for piping component


ASME B16.1 : – Cast iron pipes flanges & flanged fittings.
ASME B16.5 : – Carbon steel pipes flanges & flanged fittings. (Up to 24”)
ASME B16.47 : – Large Diameter steel flanges. (Above 24”)

Butt welded fittings

ASME B16.9 : – Steel butt welding fittings.
ASME B16.28 : – Butt-welded short radius elbows & returns bends.


ASME B16.20 / API -601: – Metallic gaskets for pipe flanges- Spiral wound, Octagonal ring Joint & Jacketed flanges.
ASME B16.21 : – Non metallic gasket.

Socket & Threaded fittings

ASME B16.11 : – Forged steel socket welding & threaded fittings.


ASME B16.10 : – Face to face & end to end dimension of valves.
ASME B16.34 : – Flanged & butt-welded ends steel valves (Pressure &Temperature ratings) except Ball, Plug & Butter fly Valves.


1.ASME B36.10 : – Welded & Seamless wrought iron pipes.
2.ASME B36.19 : – Stainless steel pipes.

ASME B31.3 – Process piping

This asme standards prescribes requirements for the materials, design, fabrication, assembly, erection, examination, inspection, and testing of  piping within the property limits of facilities engaged in the processing or handling of chemical petroleum or related products.  The requirements of ASME B31.3 apply for all fluids, including raw, intermediate and finished chemical, petroleum products, gas, steam, air and water.
In case of packaged equipment, the interconnection piping with the exception of refrigeration piping shall be in compliance with the requirement of ASME B313.3. The refrigeration piping may conform to either ASMEB31.3 or ASMEB31.5.
The requirement  of ASME B31.3 do not apply to piping system designed for internal gauge pressure at or above 0 but less than 15 psig provided the fluid handled is  non-flammable, nontoxic and not damaging to human tissue and design temperature s from -29 deg C through 180 deg C.
The following piping and equipment are not required to comply with the requirements of ASME B31.3
  • Power boiler and the boiler external piping
  • Piping covered by ASME B31.8, B31.8 and B31.11
  • Piping covered by applicable governmental regulations
  • Piping for fire protection systems
  • Plumbing, sanitary sewers and storms sewers
  • Tubes, tubes headers, crossovers and manifolds of fired headers

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