Indian Standard DIMENSIONS AND TOLERANCES FOR WROUGHT ALUMINIUM AND ALUMINIUM ALLOY DRAWN ROUND TUBES ( Second Revision )
0.1 This Indian Standard ( Second Revision ) was adopted by the Indian Standards Institution on 15 January 1987, after the draft finalized by the Light Metals and Their Alloys Sectional Committee had been approved by the Structural and Metals Division Council.
0.2 This standard was first published in 1963 and subsequently revised in 1972. In this revision the tolerances on straightness have been added.
0.3 This standard should be used in conjunction with IS : 738-1977*.
0.4 For the purpose of deciding whether a barticular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960t. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.