Form IV Part A: Constructor's certificate of manufacture and test

What is Form IV Part A?

Form IV Part A of the Indian Boiler Regulations, 2026 is the constructor's certificate of manufacture and test, prescribed under regulation 8(b). Under the Indian Boiler Regulations, 1950 it was Form III (constructor's certificate of manufacture and test).

Who issues and signs Form IV Part A?

The maker of the boiler or its representative; the Inspecting Authority countersigns it.

What does Form IV Part A record?

• Description: constructor, contract, type of boiler, length and diameter, design pressure, maker's number and year of make, heating surface, evaporation capacity, steam temperatures
• Parts made at the constructor's works, and parts made outside it, with drawing numbers and makers
• Construction: the chapter it complies with, numbers of longitudinal and circumferential seams, weld repairs, heat treatment, radiography
• Drums and shells; headers and boxes
• Mountings: main and auxiliary stop valves, safety valves, blow-down valves, feed check valves
• Safety valve details and test results
• The maker's certification that the listed parts were used, backed by the makers' certificates

When is Form IV Part A filed, and with what?

Goes with the registration application, with Form I Part B or C, the drawings, and Form V Part B listing every material certificate used (regulation 8).

What changed for Form IV Part A from IBR 1950?

Under IBR 1950 this was Form III. Under IBR 2026 the extract of all material test certificates (Form V Part B) is filed with it.

Related forms

• Form IV Part B: Certificate of manufacture and test for pipes (was Form III-A)
• Form IV Part C: Certificate of manufacture and test for tubes (was Form III-B)
• Form IV Part D: Certificate of manufacture and test of boiler mountings and fittings (was Form III-C)
• Form IV Part E: Certificate of manufacture and test of castings (was Form III-F)
• Form IV Part F: Certificate of manufacture and test of forgings (was Form III-G)
• Form IV Part G: Certificate of manufacture and test for headers, desuperheaters/attemperators, blowdown tanks, feed water tanks, accumulators and deaerators (was Form III-H)
• Form IV Part H: Certificate of manufacture and test for dished ends and end covers (was Form III-I)
• Form XXII: Certificate of manufacture and test for small industrial boilers (was Form XVII)
• Form XXIII: Certificate of manufacture and test for small solar boilers (was Form XVII)