|Reg. 53 d
MATERIALS OF CONSTRUCTION
SEAMLESS FERRITIC PIPES FOR HIGH TEMPERATURE
Selection of Tubes for testing
(d) Test specimen - (i)
Test specimens required for flattening and expanding/flaring test
specified in regulations 54(a), 54(b) and 54(c) shall be taken from
ends of finished pipes prior to upsetting, swaging, expanding or any
other forming operations or being cut to length.
They shall be smooth on ends and free from burrs and flaws.
(ii) If desirable and practicable, tensile test may be carried out
on full section of the pipe upto the capacity of the testing
machine. For large size
pipes the tensile test specimen shall consist of strip cut
longitudinally from the pipe and which is not straightened within
the gauge length and further heat treated.
(iii) If any test
specimen shows flaws or defective machining it may be discarded and
another specimen substituted.
specimens shall be tested at room temperature.
(e) Number of tests - (i) The
tests specified in regulations 54(a), 54(b) and 54(c) shall be made
on minimum 2 pipes for first 100 pipes and 1 per 100 part thereof
for pipes over 100 numbers.