Form I Part D: Inspecting Authority's certificate of inspection during construction of boilers with permitted variations from standard conditions

What is Form I Part D?

Form I Part D of the Indian Boiler Regulations, 2026 is the inspecting Authority's certificate of inspection during construction of boilers with permitted variations from standard conditions, prescribed under regulation 8(a)(iv). Under the Indian Boiler Regulations, 1950 it was Form II-B (inspecting authority certificate of inspection for boilers for which variation from standard conditions has been permitted).

Who issues and signs Form I Part D?

The Inspecting Authority.

What does Form I Part D record?

• The boiler type, length, diameter, design pressure, maker and shop number
• That it was built under supervision, in accordance with the permitted variations from the standard conditions
• The stamp on the front end plate
• The water pressure test of the drum and header
• Material and weld tests, struck out where a Well-known steel maker's Form V Part A is furnished instead
• The maker's drawing number, and that Form IV Part A was countersigned

When is Form I Part D filed, and with what?

Filed in place of Form I Part B or Part C (regulation 8(a)(iv)).

What changed for Form I Part D from IBR 1950?

Under IBR 1950 this was Form II-B.

Related forms

• Form I Part A: Inspecting Authority's certificate of inspection during construction, boiler made to a foreign code for export (was Form II-A)
• Form I Part B: Certificate of inspection for shop assembled boilers (was Form II(1))
• Form I Part C: Certificate of inspection for site assembled boilers at maker's works (was Form II(2))
• Form I Part E: Inspecting Authority's certificate of inspection after completion of boiler erection at assembly site (was Form II-C)
• Form VIII: Final inspection report for boiler components