What is IBR?

IBR is Indian Boiler Regulations, which was created in 15th September 1950 in exercise of the powers conferred by section 28 & 29 of the Indian Boilers Act. The Indian Boilers Act was formed in 1923, 23rd February to consolidate and amend the law relating to steam boilers.


Which steam boilers and steam pipes are regulated by IBR ?

Steam boiler

Steam boilers under IBR means any closed vessel exceeding 22.75 liters in capacity and which is used expressively for generating steam under pressure and includes any mounting or other fitting attached to such vessel which is wholly or partly under pressure when the steam is shut off.

Steam pipes

IBR steam pipe means any pipe through which steam passes from a boiler to a prime mover or other user or both if pressure at which steam passes through such pipes exceeds 3.5 kg/cm2 above atmospheric pressure or such pipe exceeds 254 mm in internal diameter and includes in either case any connected fitting of a steam pipe.



A tragic boiler explosion in Calcutta in 1863 was the origin of the Indian Boiler Regulation.
A bill was passed by the Bengal Council in 1864 calling for the inspection of steam boilers in and around Calcutta. Other Indian provinces followed, and eventually the country decided on one uniform set of regulations and passed The Indian Boilers Act in 1923. The regulations would cover not only inspections, but also the conditions for material procurement. The Central Boilers Board was formed as a result of an amendment in 1937. The latest version of the law is known as the Indian Boiler Regulation, 1950. Amendments are issued from time to time.

Also read – What is the difference between IBR and Non-IBR boilers?

IBR Basics

What does the IBR cover?

The IBR covers the design, fabrication, inspection, testing and certification of:

Boilers or any boiler part including feed piping and fittings or vessels attached thereto Boiler components, meaning

  • steam piping
  • feed piping
  • economizers
  • super heaters
  • valves, including safety valves
  • any mounting or fitting or any external or internal part of a boiler which is subjected to pressure exceeding one Kg/cm square gauge
  • Steam receivers, separators, steam traps, accumulators and similar vessels
  • Heat exchangers, converters, evaporators and similar vessels in which steam is generated
  • Materials, e.g. forgings, castings, tubes, pipes, plates, welding consumables

Who needs to receive IBR certification for materials?

  • Any manufacturer of boiler or boiler components wishing to send them to India needs IBR certification. This includes manufacturers in India as well.

What is an Inspecting Authority?

  • An agency recognized by the Central Boiler Board as an IBR certifying authority. Inspecting Authorities are required to sign off on many parts of the IBR certification process. They are heavily scrutinized by the Indian government. Inspecting Authorities are given certificates indicating their approval; always ensure that a Competent Person is approved by the CBB. Not all Inspecting Authorities are authorized to inspect in all countries.

What is a Competent Authority?

  • An institution recognized in such a manner as may be prescribed by regulations for issue of certificate to the welders for welding of boilers and boiler components.

A typical IBR inspection includes three stages


What are some common issues with IBR certifications?

  • Design calculations not meeting requirements of IBR
  • Specific IBR requirements concerning production test coupons
  • Bend test requirements for materials
  • Incorrect test pressures
  • Failure to involve an Inspecting Authority in the case of deviations resolution
  • Material sourcing with relevant IBR forms appears to be the major issue
  • Incorrect/incomplete filling of relevant IBR forms
  • Welder qualification and certification as per IBR 1950

What is a typical delay for dealing with an IBR-related issue?

Delays can vary anywhere from weeks to months. It is crucial for a manufacturer to know all the common problems and issues up front when constructing a pressure vessel or boiler, so as to reduce these costly delays.