This standard covers vulcanized fibre rods of circular section from 5 mm up to and including 25 mm diameter and tubes of circular section
from 10 mm up to and including 50 mm internal diameter with wall thickness from 1 mm up to and including 10 mm.
Note — Tubes up to 100 mm internal diameter are normally manufactured. The test methods and values for tubes of diameter greater than 50 mm should be agreed between the supplier and the purchaser.
IS 5711-1970 history
1971IS 5711-1970 Specification for vulcanized fiber rods and tubes for electrical use