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Reg. 87
MATERIALS OF CONSTRUCTION

GENERAL GREY IRON CASTINGS (GRADE A)

Provision of test bars

The Inspecting Authority shall state at the time of enquiry whether he requires tensile or transverse tests, or both, and he may also specify cast-on bars where the design of the casting and method of running permit.

When the test bars are cast separately they shall be poured at the same time and from the same ladle, or metal as the casting or castings they represent. The number of test bars specified in Regulation 92 shall be applicable to all castings of each melt.

When the bars are cast-on, the mould for the casting and the mould for the test piece shall be joined together in such a manner that the liquid metal fills both moulds at the same operation.

All test bars shall be cast in green sand or dry sand or in loam moulds according as to whether the casting or castings they represent are moulded in green sand, or in loam or dry sand, respectively.

The test bars shall not be subjected to any heat treatment after leaving the moulds.

 
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Message from Chairman of Central Boilers Board About Central Boiler Board History of Indian Boiler Regulations Foreword Contents Chapter Wise Contents Regulation Wise List of Amendments
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