Seamless Tubing and Couplings Hydrosulfide-Carbon Dioxide- and Cold-Resistant

Steel seamless tubing as per this TU has enhanced corrosion resistance and is cold-resistant up to temperature -50°C.

 The general corrosion rate for metal of tubing, couplings and strengthened connection parts is not more than 0.5 mm/year.
The tubing is made in two versions:
1. Plain tubes with couplings per GOST 633-80;
2. Tubes completed with strengthened connection parts.
The tubes are manufactured with strength groups Ks, Es, Ls with range as per GOST 633-80.
The range of tubing with couplings is specified by Table 1.1.
DN (nominal diam.) of pipe, mm
Tube wall thickness, mm
Tube type
Plain, without thread
Plain, with triangular thread
60
5,0
Ks, Es, Ls
Ks, Es, Ls
73
5.5 : 7.0
Ks, Es, Ls
Ks, Es, Ls

The range of tubing with strengthened connection parts is specified by Table 1.2.
Tube type
DN (nominal diam.),
mm
Tube wall thickness,
mm
Outside Diameter of coupling and sub,
mm
Plain as per
GOST 633-80
60
73
89
5.0
5.5 : 7.0
6.5 : 8.0
6,5
7.0
73.0
88.9
108.0
120.6
132.1
The tubes are manufactured in version A per GOST 633-80.
In coordination with client the tubes can be manufactured with the length up to 11 meters.
The tubes and couplings are manufactured from tube shell made from steel 30 FB, 30 KhF and 30 KhMFBA.

Mechanical properties of tubes and couplings are specified by Table 1.3.
Parameter description
Nominal value of parameter for steel of strength group:
Кs
Еs
Ls
Tensile strength, σt,
N/mm2(kgf/mm2),
not less than
647 (66)
657 (67)
755 (77)
Yield strength, σy,
N/mm2(kgf/mm2),
not less than
not more than
519 (53)
627 (64)
549 (56)
657 (67)
647 (66)
784 (80)
Ratio σy/σt,
not more than
0,8
0,85
0,85
Rockwell hardness,
not more than
95 HRB
98 HRB
98 HRB
Elongation, δ5, %,
not less than
18
16
15
Impact strength at Charpy specimens,
J/cm2(kgcm/mm2),
at test temperature -50°C
not less than KCV-50°C.
98(10)
98(10)
98(10)
Share of ductile component (V) at test temperature -50°C %,
not less than
70
70
70
The tubing per this TU is completed with wear-resistant connection parts (interlocks).
The couplings and subs of wear-resistant interlocks are fabricated from steel 40 Kh, 40 KhFBA, and 40 KhMFBA and subjected to ionic nitride hardening procedure. Using of interlocks provides increased service life of threaded connections.
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Carbon Steel Tubes for General Structural Purposes

Standard: DIN 2448
DIN 2448 Seamless Steel Pipes and Tubes-Dimensions, Conventional Masses per Unit Lengthstandard reference.
DIN 2448 Seamless pipes
Dimensions
O.D.
mm
Wall Thickness (mm)
2
2,3
2,6
2,9
3,2
3,6
4
4,5
5
5,6
6,3
7,1
8
8,8
10
11
12,5
14,2
Weight (kg/m)
17,2
0,75
0,84
0,936
1,02
1,1
1,21
1,3
1,41










19
0,838
0,947
1,05
1,15
1,25
1,37
1,48
1,61
1,73









20
0,89
1
1,12
1,22
1,33
1,46
1,58
1,72
1,85









21,3
0,95
1,08
1,2
1,32
1,43
1,57
1,71
1,86
2,01









25
1,13
1,29
1,44
1,58
1,72
1,9
2,07
2,28
2,47
2,68
2,91







25,4
1,15
1,31
1,46
1,61
1,75
1,94
2,11
2,32
2,52
2,73
2,97







26,9
1,23
1,4
1,56
1,72
1,87
2,07
2,26
2,49
2,7
2,94
3,2
3,47






30

1,57
1,76
1,94
2,11
2,34
2,56
2,83
3,08
3,37
3,68
4,01






31,8

1,67
1,87
2,07
2,26
2,5
2,74
3,03
3,3
3,62
3,96
4,32
4,7





33,7

1,78
1,99
2,2
2,41
2,67
2,93
3,24
3,54
3,88
4,26
4,66
5,07





38


2,27
2,51
2,75
3,05
3,35
3,72
4,07
4,47
4,93
5,41
5,92
6,34




42,4


2,55
2,82
3,09
3,44
3,79
4,21
4,61
5,08
5,61
6,18
6,79
7,29
7,99



44,5


2,69
2,98
3,26
3,63
4
4,44
4,87
5,37
5,94
6,55
7,2
7,75
8,51
9,09


48,3


2,93
3,25
3,56
3,97
4,37
4,86
5,34
5,9
6,53
7,21
7,95
8,57
9,45
10,1
11

51


3,1
3,44
3,77
4,21
4,64
5,16
5,67
6,27
6,94
7,69
8,48
9,16
10,1
10,9
11,9

54


3,3
3,65
4,01
4,47
4,93
5,49
6,04
6,68
7,41
8,21
9,08
9,81
10,9
11,7
12,8

57



3,87
4,25
4,74
5,23
5,83
6,41
7,1
7,88
8,74
9,67
10,5
11,6
12,5
13,7
15
60,3



4,11
4,51
5,03
5,55
6,19
6,82
7,55
8,39
9,32
10,3
11,2
12,4
13,4
14,7
16,1
63,5



4,33
4,76
5,32
5,87
6,55
7,21
8
8,89
9,88
10,9
11,9
13,2
14,2
15,7
17,3
70



4,8
5,27
5,9
6,51
7,27
8,01
8,89
9,9
11
12,2
13,3
14,8
16
17,7
19,5
73



5,01
5,51
6,16
6,81
7,6
8,38
9,31
10,4
11,5
12,8
13,9
15,5
16,8
18,7
20,6
76,1



5,24
5,75
6,44
7,11
7,95
8,77
9,74
10,8
12,1
13,4
14,6
16,3
17,7
19,6
21,7
82,5




6,26
7
7,74
8,66
9,56
10,6
11,8
13,2
14,7
16
17,9
19,4
21,6
23,9
88,9




6,76
7,57
8,38
9,37
10,3
11,5
12,8
14,3
16
17,4
19,5
21,1
23,6
26,2
101,6





8,7
9,63
10,8
11,9
13,3
14,8
16,5
18,5
20,1
22,6
24,6
27,5
30,6
108





9,27
10,3
11,5
12,7
14,1
15,8
17,7
19,7
21,5
24,2
26,3
29,4
32,8
114,3





9,83
10,9
12,2
13,5
15
16,8
18,8
21
22,9
25,7
28
31,4
35,1
127






12,1
13,6
15
16,8
18,8
21
23,5
25,7
28,9
31,5
35,3
39,5
133






12,7
14,3
15,8
17,6
19,7
22
24,7
27
30,3
33,1
37,1
41,6
139,7






13,4
15
16,6
18,5
20,7
23,2
26
28,4
32
34,9
39,2
43,9
152,4







16,4
18,2
20,3
22,7
25,4
28,5
31,2
35,1
38,4
43,1
48,4
159







17,1
19
21,2
23,7
26,6
29,8
32,6
36,7
40,1
45,2
50,7
168,3







18,2
20,1
22,5
25,2
28,2
31,6
34,6
39
42,7
48
54



Standard: ASTM A53
ASTM A53 Standard specification covers Seamless and Welded, Black and Hot-Dipped Galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding.
ASTM A53 pipes The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding.

A53 pipe comes in three types and two grades
  • A53 Type F, which is longitudinally furnace butt welded or continuous welded (Grade A only)
  • A53 Type E, which is longitudinally electric resistance welded (Grades A and B)
  • A53 Type S, which is seamless pipe, produced by hot working, and possibly cold finishing, the steel (Grades A and B). ASTM A53, Type S is now currently an outdated specification and has been replaced by ASTM A106 specification for seamless carbon steel pipe.
This is a standard set by the standards organization ASTM International, a voluntary standards development organizations that sets technical standards for materials, products, systems, and services.
Dimensions
N.S.
in
O.D.
Schedule
STD
40
XS
80
120
160
XXS
mm
mm
kg/m
mm
kg/m
mm
kg/m
mm
kg/m
mm
kg/m
mm
kg/m
mm
kg/m
3/8
17,1
2,31
0,84
2,31
0,84
3,2
1,1
3,2
1,1
-
-
-
-
-
-
1/2
21,3
2,77
1,27
2,77
1,27
3,73
1,62
3,73
1,62
-
-
-
-
-
-
3/4
26,7
2,87
1,69
2,87
1,69
3,91
2,2
3,91
2,2
-
-
-
-
-
-
1
33,4
3,38
2,5
3,38
2,5
4,55
3,24
4,55
3,24
-
-
-
-
-
-
1 1/4
42,2
3,56
3,39
3,56
3,39
4,85
4,47
4,85
4,47
-
-
-
-
-
-
1 1/2
48,3
3,68
4,05
3,68
4,05
5,08
5,41
5,08
5,41
-
-
-
-
-
-
2
60,3
3,91
5,44
3,91
5,44
5,54
7,48
5,54
7,48
-
-
8,74
11,11
11,07
13,44
2 1/2
73
5,16
8,63
5,16
8,63
7,01
11,41
7,01
11,41
-
-
9,53
14,92
-
-
3
88,9
5,49
11,29
5,49
11,29
7,62
15,27
7,62
15,27
-
-
-
-
-
-
3 1/2
101,6
5,74
13,57
5,74
13,57
8,08
18,63
8,08
18,63
-
-
-
-
-
-
4
114,3
6,02
16,07
6,02
16,07
8,56
22,32
8,56
22,32
11,13
28,32
13,49
33,54
-
-
5
141,3
6,55
21,77
6,55
21,77
9,53
30,97
8,53
30,97
12,7
40,28
-
-
-
-
6
168,3
7,11
28,26
7,11
28,26
10,97
42,56
10,97
42,56
14,27
54,2
-
-
-
-
Weight per unit calculation formula: 
w = (O.D. - W.T.) x W.T. x 0.0246615 (kg/m)
w = (O.D. - W.T.) x W.T. x 10.68 (lb/ft)


Steel Requirements
Standard
Steel grade
Chemical requirements
Mechanical requirements
C
Mn
P
S
Si
Tensile
Yield strength
Elongation
max.
max.
max.
max.
max.
strength
A min.
(%)
(%)
(%)
(%)
(%)
N/mm2
N/mm2
(%)

A
0,25
0,95
0,05
0,045
-
min. 330
min. 210
calc. acc.to
B
0,3
1,02
0,05
0,045
-
min. 415
min. 240
wall thick.
DIN 1629



ST 35
0,17
-
0,025
0,025
0,35
340-470
min. 235
25
ST 37
0,17
-
0,04
0,03
-
350-480
min. 235
25
ST 45
0,21
-
0,04
0,025
0,35
440-570
min. 255
21
ST 52
0,22
-
0,04
0,03
-
500-650
min. 255
21
GOST

ST 10
0,07-0,14
0,35-0,65
0,03
0,03
0,17-0,37
354-480
min. 255
25
ST 20
0,07-0,14
0,35-0,65
0,03
0,03
0,17-0,37
420-550
min. 265
21

Note:
LENGTHS
Random length: 4,00-12,00 meters (13,1-40,1 ft) for W.T. < 11,00 mm
11,00 mm ">4,00-10,00 meters (13,1-33,0 ft) for W.T. > 11,00 mm
Fixed lengths within the manufacture lengths range, Tolerances: ± 100 mm (± 3,94 ft)
PROTECTION
Unprotected or external oiled/external varnished
At customers each pipe is provided with plastic protectors at both ends
MARKING
Die stamping or/and paint stenciled according to standard or per customer request
Technical details can be also marked on tags attached to each bundle.
DELIVERY
In bundles of maximum 2500 Kg, tied in minimum four places with steel strips.
MILL TEST REPORT
Mill test reports are issued to customer requirements.
Usually they comply with EN 10204 - 3.1.B (DIN 50049 - 3.1.B)
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Seamless steel pipe >>

Seamless steel pipe >>
Seamless steel pipe is alos called CDS pipes (Cold drawn seamless pipe).

Ceramic Lined Composite Pipes

SHS (Self-propagating High-temperature Synthetic process) ceramic lined steel pipe and elbow create a new generation of abrasion and corrosion resistant engineering pipeline. Hoop strength is the resistance against radial pressure. The strength of the ceramic -lined steel composite pipe is 300 to 500MPa. 

Flanges General

Flanges General
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system.

Pipe fitting

Pipe fitting
Pipe fitting is work that involves the installation or repair of pipes or tubes. Pipes and tubes are necessary for a wide range of reasons.

Top seamless pipes

10CrMo9-10 13CrMo4-5 304H 304L 316 316L A519 1020 A519 1025 A519 1035 A519 1045 Alloy Steel Tube api 5ct API 5CT J55 API 5CT K55 API 5CT L80 API 5CT N80 API 5CT P110 API 5L API 5L PSL1 X42 API 5L PSL1 X46 API 5L PSL1 X52 API 5L PSL1 X56 API 5L PSL1 X60 API 5L PSL2 Grade B API 5L PSL2 X42 API 5L PSL2 X46 API 5L PSL2 X52 API SPEC 5CT ASME 556 ASME SA179 ASME SA210 ASME SA210 seamless tube ASME SA213 ASTM ASTM A106 ASTM A106 Gr.B Seamless pipe ASTM A106 Grade A ASTM A106 Grade B ASTM A106 Grade C ASTM A178 astm a179 ASTM A179 tubing ASTM A192 ASTM A199 ASTM A199 T11 ASTM A199 T22 ASTM A199 T5 ASTM A210 ASTM A500 astm a513 ASTM A513 1010 ASTM A513 1020 ASTM A513 1026 ASTM A513 4130 ASTM A513 Mechanical Tubing ASTM A519 ASTM A519 1010 ASTM A519 1020 ASTM A519 1025 ASTM A519 1035 ASTM A519 1045 ASTM A519 4130 ASTM A519 4140 ASTM A53 ASTM A556 ASTM B163 ASTM B729 ASTM SA53 BKS boiler tube Boiler tubes BS3059 BS3059 II 360 BS3059-II 440 carbon steel pipe carbon steel pipes carbon steel tube Carbon Steel tubes Carbon Steel Tubes for General Structural Purposes Casing Casing pipe Cold Drawn Seamless Cold-Resistant tube Couplings Hydrosulfide-Carbon Dioxide DIN 17175 steel seamless pipes DIN 2391 DIN 2391 St35 DIN 2391 St45 DIN 2391 St52 DIN 2448 DIN1629 DIN1629 ST37.0 DIN1629 ST44.0 DIN1629 ST52.0 DIN17175 DIN17175 St35.8 DIN2391 St35 DIN2391 St45 DIN2391 St52 DIN2448 Drill pipe Drill pipes Drill Pipes with Welded Tool Joints eamless Tubing EN 10204 EN 10204 3.2 EN 10210 EN 10216 EN 10216-1 EN 10216-2 EN 10297 Mechanical Tubes EN10216-1 P195 EN10216-1 P235 EN10216-1 P265 EN10216-2 EN10305-1 E215 EN10305-1 E235 EN10305-1 E355 ERW Line pipes G3461 STB510 GB3087 GOST 633-80 Tubing Heat Exchanger tubes Heat exchanger tube heat exchanger tubes heat exchangers heater tubes High Longevity Oil-Well Tubing and Interlocks of Production Strings for Corrosive Media High Pressure Seamless Boiler Tube High Steel Grade Line Pipes Hot finished seamless pipe Hot finished structural hollow section Internal Threaded Tubes ISO 11960 J2H S355 J2H S355K2H JIS G3429 JIS G3429 STH11 JIS G3429 STH12 JIS G3429 STH21 JIS G3429 STH22 JIS G3441 JIS G3441 SCM415TK JIS G3441 SCM418TK JIS G3441 SCM420TK JIS G3441 SCM430TK JIS G3441 SCM435TK JIS G3441 SCM440TK JIS G3441 SCr420TK JIS G3454 JIS G3454 STPG370 JIS G3454 STPG410 JIS G3455 JIS G3455 STS370 JIS G3455 STS410 JIS G3455 STS480 JIS G3456 JIS G3456 STPT370 JIS G3456 STPT410 JIS G3456 STPT480 JIS G3461 STB340 JIS G3461 STB410 JIS G3462 JIS G3462 STB A12 JIS G3462 STB A13 JIS G3462 STB A24 JOH S275 JOH S355 Line pipe Line Pipe for Sour Service Line Pipe with Plain End and Beveled line pipes LSAW Line Pipes Mechanical Tubes mechanical tubing OCTG P195GH P235GH P265GH PIPE pipe for shipbuilding Pipe line pipe lines pipeline Precision Seamless Steel Tube for Mechanical and Automobile Precision steel tube precision steel tubes pressure tube S235JRH S275 SA213 Seamless Alloy Steel Tube Seamless Line Pipes Seamless pipe Seamless pipes Seamless Pipes and Tubes for Pressure Applications Seamless Precision steel tubes Seamless Precision tubes seamless steel pipe Seamless steel pipe for low and medium pressure seamless steel pipes seamless steel tube Seamless Steel Tube for Fluid Transportation Service Seamless Steel Tube for Ship-building seamless steel tubes Seamless tube Seamless tubes Seamless Tubing St 37.0 Stainless Tubes Stainless Steel Pipes Stainless Steel Seamless Pipes Stainless Steel Seamless Tubes Stainless Steel Tubes steel line pipe Steel pipe steel pipes steel tube steel tubes Structural tube Sunny Steel superheater tubes Threaded casing Threaded casing with long Round Thread or Buttress Threaded Casing with Short round thread Threaded Casing with Short/Long Round Thread or Buttress TP 304 Tubes for Fluid Transportation Service Tubes for Heat Exchanger and Condensers Tubes for high temperature service Tubes for Mechanical and Automobile Tubing U bend tube U bend Tubes U tube U-bend tubes