Alloy Steel Pipes
Carbon Steel Pipes
GOST 550-75 10
GOST 550-75 10G2
GOST 550-75 20
GOST 550-75 12ChM
GOST 550-75 15Ch5M
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GOST 550-75 Seamless steel tubes for petroleum processing and the petrochemical industry
Standard: GOST 550-75
Equivalent Standard: DIN 17175, EN 10216-2, ASTM A213, ASTM A335, ASME SA213, GB9948
Material: 15Ch5M, 15Cr5Mo
Equivalent Materials: 15X5M, P5, T5, K41545
Chemistry Composition
C, %
Si, %
Mn, %
P, %
S, %
Cr, %
Mo, %
Ni, %
0.15 max
0.5 max
0.5 max
0.025 max
0.030 max
4.5-6.0
0.45-0.60
0.60 max
Mechanical Properties
Type
Tensile Strength , MPa
Yield Strength, MPa
Elongation, %
Hardness, HB
Hot rolled
392 min
216 min
22 min
170 max
Cold & Warm
392 min
216 min
22 min
170 max
Outside Diameter & Tolerance
Group A
Cold & Warm
Material
Outside Diameter, mm
Tolerance, mm
10, 20
OD<57
GOST 9567-75
Alloy Steel Pipes
OD<30
±0.20
30≤OD<57
±0.30
Hot rolled
Material
Outside Diameter, mm
Tolerance, mm
All
OD≥57
+0.5%/-1.25%
Group B
Outside Diameter , mm
Tolerance, mm
Normal
High
Higher
OD≤50
±0.50
±0.50
GOST 8734-75
50<OD≤219
±1.0%
±0.8%
GOST 8734-75
OD>219
±1.25%
±1.0%
GOST 8734-75
Wall thickness & Tolerance
Group A
Cold & Warm
Wall Thickness, mm
Tolerance, %
All
±8
Hot rolled
Wall Thickness, mm
Tolerance, %
WT≤15
±12.5
WT>15
±10
Group B
Outside Diameter, mm
Tolerance, %
Normal
High
Higher
WT≤15, OD≤219
+12.5/-15.0
±12.5
GOST 8734-75
15<WT<30, OD≤219
±12.5
+10.0/-12.5
GOST 8734-75
WT≥30, OD≤219
+10.0/-12.5
±10
GOST 8734-75
WT≤15, OD>219
+12.5/-15.0
+12.5/-15.0
GOST 8734-75
15<WT<30, OD>219
±12.5
±12.5
GOST 8734-75
WT≤15, OD>219
+10.0/-12.5
+10.0/-12.5
GOST 8734-75
GOST 550-75 shall be applied to steel pipes designed for petroleum processing and the petrochemical industry. Depending on their purpose, pipes shall be manufactured in groups A and B. The dimensions of cold worked, warm worked and hot worked pipes of group A shall be in accordance with those specified in table 1 of GOST 550-75, dimensions of cold worked and warm worked pipes of group B shall be in accordance with GOST 8734-75, and the dimensions of hot worked pipes of group B shall be in accordance with GOST 8732-78. The pipes of group A shall be manufactured with a length of cut in compliance with table 1 of GOST 550-75, and a minimum length not less than 4 m.
Length: 4000mm; 8030mm; 8050mm; 12010mm; 12030mm; 12050mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning.
Keyword: seamless steel pipes, seamless steel tubes, ГОСТ 550-75, GOST 550-75
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