Seamless carbon steel pipe for high temperature service.
COMPOSITION CHIMIQUE EN %
Grades | C | Mn | S | P | Si | Cr | Cu | Mo | Ni | V | |||||||||||||||||||||||||||||
maxi (a | maxi | maxi | mini | maxi (b) | maxi (b) | maxi (b) | maxi (b) | maxi (b) | |||||||||||||||||||||||||||||||
A | 0.25 | 0.27 to 0.9 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 | |||||||||||||||||||||||||||||
B | 0.30 | 0.29 to 1.0 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 | |||||||||||||||||||||||||||||
C | 0.35 | 0.29 to 1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
(a) For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted, up to a maximum of 1.35 %
(b) These five elements combined shall not exceed 1 %.
TENSILE REQUIREMENTS
Grades | Minimum tensile strength | Minimum yield strength | Minimum elongation(1) | ||||||||||||||||||||||||||||||||||||
Longitudinal | Transverse | ||||||||||||||||||||||||||||||||||||||
ksi | MPa | ksi | MPa | in 2”, per cent | |||||||||||||||||||||||||||||||||||
A | 48.0 | 330 | 30.0 | 205 | 35 | 25.0 | |||||||||||||||||||||||||||||||||
B | 60.0 | 415 | 35.0 | 240 | 30 | 16.5 | |||||||||||||||||||||||||||||||||
C | 70.0 | 485 | 40.0 | 275 | 30 | 16.5 |
(1) Basic minimum elongation transverse strip tests, and for all small sizes tested in full section. For longitudinal strip tests minimum elongation in 2” shall be : e = 625.000 A 0.2 /U 0.9 (see ASTM).
TOLERANCES
Outside diameter : as follows
Nominal pipe size NPS | Outside diameter mm | Variations in outside diameter | |||||||||||||||||||||||||||||||||||||
over | under | ||||||||||||||||||||||||||||||||||||||
mm | inches | mm | inches | ||||||||||||||||||||||||||||||||||||
1/8 to 1 1/2 | 10.3 to 48.3 | 0.40 | 1/64 (0.015) | 0.40 | 1/64 (0.015) | ||||||||||||||||||||||||||||||||||
2 to 4 | 60.3 to 114.3 | 0.79 | 1/32 (0.031) | 0.79 | 1/32 (0.031) | ||||||||||||||||||||||||||||||||||
5 to 8 | 141.3 to 219.1 | 1.59 | 1/16 (0.062) | 0.79 | 1/32 (0.031) | ||||||||||||||||||||||||||||||||||
10 to 18 | 273.0 to 457.2 | 2.38 | 3/32 (0.093) | 0.79 | 1/32 (0.031) | ||||||||||||||||||||||||||||||||||
20 to 26 | 508.0 to 660.0 | 3.18 | 1/8 (0.125) | 0.79 | 1/32 (0.031) | ||||||||||||||||||||||||||||||||||
28 to 34 | 711.0 to 864.0 | 3.97 | 5/32 (0.156) | 0.79 | 1/32 (0.031) | ||||||||||||||||||||||||||||||||||
36 to 48 | 914.0 to 1219.0 | 4.76 | 3/16 (0.187) | 0.79 | 1/32 (0.031) |
Note : For pipes NPS 10” (273 mm) and over, possibility to obtain if specially required :
outside diameter ± 1 % or inside diameter ± 1 %
On thickness | – 12.5 % | ||||||||||||||||||||||||||||||||||||||
On weight | Per unit length | + 10 % – 3.5 % | |||||||||||||||||||||||||||||||||||||
Hydrostatic test pressure (see ASTM A 530 / A 530 M-99) | Given by the formula \(P ={2 S T\over D}\) | ||||||||||||||||||||||||||||||||||||||
Lengths | If definite lengths are not required, pipe may be ordered in single random 16 to 22 ft (4.8 to 6.7 m) with 5 % 12 to 16 ft (3.7 to 4.8 m), or in double r lengths with a minimum average of 35 ft (10.7 m) with 5 % 16 to 22 ft (4.8 m to 6.7 m). | lengths o andom | |||||||||||||||||||||||||||||||||||||
DIMENSIONS
see ASME B16.10 Data