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Seamless Steel Pipe(SMLS Pipe)

Seamless Steel Pipe & Tube, Carbon Seamless Steel Pipe,SMLS Pipe & Tube, 

Black Seamless Pipe, GI Seamless Pipe         


Sizes:

Maximum diameter: 36" (914.4mm)      minimum diameter: 1/2" (21.3mm)
Maximum thickness: 60mm                     mininmum thickness: 2.11mm

SCH: SCH10,SCH20,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH160,XXS


Uses:

Chilled water pipe Steam/condensate pipe
Heat exchanger pipe
Marine/offshore pipe
Dredging pipe
Industrial pipe
Oil and gas pipe
Fire fighting pipe
Construction/structure pipe
Irrigation pipe
Drain/sewage pipe
Boiler tube


Coating

3PE Coating
3PP Coating
FBE Coating
Epoxy Coating
Special Painting

Standard of carbon seamless steel pipe

ASTM A53 Gr.B Black and hot-dipped zinc-coated steel pipes welded and seamless
ASTM A106 Gr.B Seamless carbon steel for high temperature service
ASTM SA179  Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes
ASTM SA192  Seamless carbon steel boiler tubes for high pressure
ASTM SA210  Seamless Medium-carbon boiler and superheater tubes
ASTM A213 Seamless alloy-steel boiler, superheater, and heat-exchanger tubes
ASTM A333 GR.6 seamless and welded carbon and alloy steel pipe intended for use at low temperatures.
ASTM A335 P9,P11,T22,T91
Seamless ferritic alloy-steel pipe for high-temperature service
ASTM A336 
Alloy steel forgings for pressure and high-temperature parts
ASTM SA519 4140/4130 Seamless carbon for mechanical tubing
API Spec 5CT J55/K55/N80/L80/P110/K55 Seamless steel pipe for casing
API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70 Seamless steel pipe for line pipe
DIN 17175 Seamless steel tube for elevated temperture
DN2391  Cold drawn seamless prevision pipe
DIN 1629  Seamless circular unalloyed steel tubes subject to special requirements


Chemical components & mechanical properties

Standard Grade Chemical Components (%)
Mechanical Properties
ASTM A53 C
Si
Mn
P
S
Tensile STrength(Mpa)
Yield STrength(Mpa)
A ≤0.25
- ≤0.95
≤0.05
≤0.06
≥330
≥205
B ≤0.30
- ≤1.2
≤0.05
≤0.06
≥415
≥240
ASTM A106 A
≤0.30
≥0.10
0.29-1.06
≤0.035
≤0.035
≥415
≥240
B
≤0.35
≥0.10
0.29-1.06
≤0.035
≤0.035
≥485
≥275
ASTM SA179 A179 0.06-0.18
- 0.27-0.63
≤0.035
≤0.035
≥325 ≥180
ASTM SA192 A192 0.06-0.18
≤0.25
0.27-0.63
≤0.035
≤0.035
≥325
≥180
API 5L PSL1 A 0.22
- 0.90
0.030
0.030
≥331
≥207
B
0.28
- 1.20 0.030
0.030
≥414
≥241
X42
0.28
- 1.30 0.030
0.030
≥414
≥290
X46
0.28
- 1.40 0.030
0.030
≥434
≥317
X52
0.28
- 1.40
0.030
0.030
≥455
≥359
X56
0.28
- 1.40
0.030
0.030
≥490
≥386
X60
0.28
- 1.40
0.030
0.030
≥517
≥448
X65
0.28
- 1.40
0.030
0.030
≥531
≥448
X70
0.28
- 1.40
0.030
0.030
≥565
≥483
API 5L PSL2 B
0.24
- 1.20
0.025
0.015
≥414
≥241
X42
0.24
- 1.30
0.025
0.015
≥414
≥290
X46
0.24
- 1.40
0.025
0.015
≥434
≥317
X52
0.24
- 1.40
0.025
0.015
≥455
≥359
X56
0.24
- 1.40
0.025
0.015
≥490
≥386
X60
0.24
- 1.40
0.025
0.015
≥517
≥414
X65
0.24
- 1.40
0.025
0.015
≥531
≥448
X70
0.24
- 1.40
0.025
0.015
≥565
≥483
X80
0.24
- 1.40
0.025
0.015
≥621
≥552


Classfication of carbon seamless steel pipe

Types Application
Structure Purposes
General structure and mechanical
Liquid Services
Petroleum, gas and other fluids conveying
Low and Medium Pressure Boiler Tube
Steam and boiler manufacturing
Hydraulic Pillar Service
Hydraulic support
Auto Semi-shaft Casing
Auto sem-shaft casing
Line Pipe
Oil and gas conveying
Tubing and Casing
Oil and gas conveying
Drill Pipes
Well drilling
Geological Drilling Pipe
Geological drilling
Furnace tubes, heat exchangers tubes
Furnace tubes, heat exchangers

Tolerances of carbon seamless steel pipe

Pipe types Pipe sizes(mm) Tolerances
Hot rolled OD<50 ±0.50mm
OD≥50 ±1%
WT<4 ±12.5%
WT 4~20 +15%, -12.5%
WT>20 ±12.5%
Cold drawn OD 6~10 ±0.20mm
OD 10~30
±0.40mm
OD 30~50 ±0.45
OD>50 ±1%
WT≤1 ±0.15mm
WT 1~3 +15%, -10%
WT >3 +12.5%, -10%


Production of seamless pipe

The process begins with solid steel rounds, or billets, being cut to a specified length and sent through a walking-beam reheat furnace, where temperatures reach nearly 2,300°F. After exiting the reheat furnace, the preheated rounds are turned into a tube shell in the rotary piercing mill as the billets are cross-rolled between two barrel-shaped rolls at a high speed. The seamless shells enter mandrel mill, where they are rolled over a retained mandrel to provide the needed OD size and wall thickness for the next process. The process is carefully monitored using a state-of-the-art hot-wall measuring system. The shells are then reheated for final forming in a 24-stand stretch-reducing mill, where outside diameters are formed to customers’ exacting specifications. Wall thickness is again verified using a hot-wall measuring system. After being rotated and advanced on the walking-beam cooling bed, the pipes are batch cut and transferred to an in-process storage area, where they are handled by computer-controlled gantry cranes. 


Ultrasonic Inspection for Small-diameter Seamless Pipe
Ultrasonic inspection is in accordance with pulse-echo method using water gap method. Flow detection is performed by angle beam technique to date longitudinal and transverse flow on the inner and outer surface of pipe, and wall thickness measurement is performed by normal beam technique. The pipe, which is conveyed helically through the testing device, is inspected.


Electromagnetic Inspection for Large-diameter Seamless Pipe 
Plug mill is equipped with an Amalog-Sonoscope, electromagnetic inspection units after heat treatment. The Amalog-Sonoscope pipe inspection system detects defects by using flux leakage by electromagnetic induction in search coil. Amalog magnetic circuits detect longitudinal defects in both the inside and outside surface. Sonoscope magnetic circuits detect circumferential defects.

Magnetic Particle Inspection 
The tube is magnetized and provided with magnetic particles (mostly fluorescent magnetic particle). The presence of flaws creates a magnetic flux which shows changes in fluorescent brilliance under black light. The change is detected visually.


Carbon seamless steel pipe is a kind of strip steel. Steel pipe with hollow cross-section, a large number of pipes used to transport fluid, such as the transportation of oil, natural gas, gas, water and some solid materials such as pipes. Steel and round steel and other solid steel compared to the same bending strength in the same bending, lighter weight, is an economic section of steel, is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, Bicycle frames and steel construction scaffolding. The use of carbon seamless steel pipe manufacturing ring parts can improve material utilization, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jackets, etc., has been widely used to manufacture steel pipe. 

Maximum diameter: 36" (914.4mm)      minimum diameter: 1/4" (13.7mm)

Maximum thickness: 60mm                     mininmum thickness: 2.11mm


NOMINAL  PIPE  SIZE

OD

(mm)


NOMINAL WALL THICKNESS


DN

NB(inch)

ASME

SCH10

SCH20

SCH30

STD

SCH40

SCH60

XS

SCH80

SCH100

SCH120

SCH140

SCH160

XXS

15

1/2"

21.3

2.11


2.41

2.77

2.77


3.73

3.73




4.78

7.47

20

3/4"

26.7

2.11


2.41

2.87

2.87


3.91

3.91




5.56

7.82

25

1"

33.4

2.77


2.9

3.38

3.38


4.55

4.55




6.35

9.09

32

1.1/4"

42.2

2.77


2.97

3.56

3.56


4.85

4.85




6.35

9.7

40

1.1/2"

48.3

2.77


3.18

3.68

3.68


5.08

5.08




7.14

10.15

50

2"

60.3

2.77


3.18

3.91

3.91


5.54

5.54




8.74

11.07

65

2.1/2"

73

3.05


4.78

5.16

5.16


7.01

7.01




9.53

14.02

80

3"

88.9

3.05


4.78

5.49

5.49


7.62

7.62




11.13

15.25

90

3.1/2"

101.6

3.05


4.78

5.74

5.74


8.08

8.08






100

4"

114.3

3.05


4.78

6.02

6.02


8.56

8.56


11.13


13.49

17.12

125

5"

141.3

3.4



6.55

6.55


9.53

9.53


12.7


15.88

19.05

150

6"

168.3

3.4



7.11

7.11


10.97

10.97


14.27


18.26

21.95

200

8"

219.1

3.76

6.35

7.04

8.18

8.18

10.31

12.7

12.7

15.09

18.26

20.62

23.01

22.23

250

10"

273

4.19

6.35

7.8

9.27

9.27

12.7

12.7

15.09

18.26

21.44

25.4

28.58

25.4

300

12"

323.8

4.57

6.35

8.38

9.53

10.31

14.27

12.7

17.48

21.44

25.4

28.58

33.32

25.4

350

14"

355.6

6.35

7.92

9.53

9.53

11.13

15.09

12.7

19.05

23.83

27.79

31.75

35.71


400

16"

406.4

6.35

7.92

9.53

9.53

12.7

16.66

12.7

21.44

26.19

30.96

36.53

40.19


450

18"

457.2

6.35

7.92

11.13

9.53

14.27

19.05

12.7

23.83

39.36

34.93

39.67

45.24


500

20"

508

6.35

9.53

12.7

9.53

15.09

20.62

12.7

26.19

32.54

38.1

44.45

50.01


550

22"

558.8

6.35

9.53

12.7

9.53


22.23

12.7

28.58

34.93

41.28

47.63

53.98


600

24"

609.6

6.35

9.53

14.27

9.53

17.48

24.61

12.7

30.96

38.89

46.02

52.37

59.54


650

26"

660.4

7.92

12.7


9.53



12.7







700

28"

711.2

7.92

12.7

15.88

9.53



12.7







750

30"

762

7.92

12.7

15.88

9.53



12.7







800

32"

812.8

7.92

12.7

15.88

9.53

17.48


12.7







850

34"

863.6

7.92

12.7

15.88

9.53

17.48


12.7







900

36"

914.4

7.92

12.7

15.88

9.53

19.05


12.7







Mexico
ASTM A500 Gr. 50
Ø12”x 10.31mmx12m
365 Tons
Spain
AISI 316L
219,1 mm  X 5 mm

12060 meters

Singapore
Black Steel Pipe
1/2"-12" SCH40

3502 PCS

Morocco 

ASTM A-213
2"*4.75mm
320 Tons

UAE

ASTM A106-B
2"-6" SCH40
1025.36 Tons
Iraq
API 5L X42 PSL-2
NPS 4” / 114,3 mm OD x 7,11 mm
3500 Tons (tender)
Zambia
ASTM A333 GRADE 6
2 IN, 12.9 MM 6M LONG
425 PCS
Saudi Arabia
API 5L gr.b
10" Nom; SCH 80

18560 meters

Vietnam

DIN 2391
Φ3/4" SCH40 6m long

167 pcs

Nigeria
A-53 GR-B
1"-6" SCH40 / 80
20590 meters (Project)
UAE
API 5L X52 line pipes
8"-24" x 9.53mmx 12m
4501 Tons
Columbia
A 53 Gr B
600 MM dia, Sch 20

263 tons

United Arab Emirates
PIPE, C.S, SEAMLESS
SCH.60 SIZE: 16 INCH
7000 METER
Vietnam
SEAMLESS PRECISION TUBE
OD = 25mm, Thick 3mm, Material: SS304
Qty # 10200 Meter
Vietnam
ASTM-A269, TP316/316L
1/2" OD x 0.049"
Qty: 1050 M
Iran
API 5L GR.B
OD 10.750 IN., SCHED NO. 80
480 Tons
Malaysia
ASTM A179 GRADE 79
19.05X2.03X1450MM
187 PCS
Nigeria
API5L X52
CHS141.3MMX6.55MMX6M
4100 METERS    
Turky
AISI 4130- 2 Length (6meter)
3" Sch XXH BW, Nace
21300 METERS
Colombia
ASTM A106
4", SCH-XXS (WT 17.1 MM)Length 20FT
1000.8 TONS
Myanmar
ASTM A-53
SCH40 /steel pipe – 2 1/2''
9 000 m
Singapore
13CrMo44
Ø220 x 14*7300mm
200 pcs
Jordan
Steel Grade: SAE 1541
63 OD  x 25 ID MM
600 MT    
Bangladesh
GR.B API5L ASTM A53
½"-6" SCH40  6 METER LENGTH
350 TONS
Indonesia
ASTM A53 Black steel
4"  &  6" & 7" SCH40
15000 METERS
Mexico
Galvanised seamless tubes
din 2440 st33.2 21,3x2.65mm
500 units
South Africa
304L 
7.11*168.3*5800mm
360 pcs
Australia
Material: ASTM A179
19.05 mm O.D. X 2.11mm X 6096mm
20,000 PCS
Thailand
Seamless casing tube J55 or K55
13 "3/8  54.5lbs / ft 9.65 WT
1000 meters
Brazil
ASTM A501 
O.D 88.3 x 5.0 mm 6M/pcs
1,000 pcs
Saudi Arabia
API 5L Gr X42 
168.3X11MM
35000M
Oman
SS 304 Seamless tube
10X1MM 3mtr per Piece
400 PCS
Macedonia
ASTM A790 S31803
33.4×3.38MM, 114.3×6.02
4000 METERS, 210 PCS
Russia
EN 10216-2, STEEL GRADE P265 GH
219.710mm X W/T: 8.306mm lENGTH: 6 MTR
3000 MTR
France
ASTM A106 Gr.B
OD 60.3 x 11.07mm thk x 6000mm
1000 EA
pain
L-80 Type 1, PSL-2
Tubing 4 1/2" OD,12.6 PPF
70 km
Iraq
Seamless elbow
273.0 x 6.3
500 pieces
Morocco
API 5L B,DIN 30670 coating
DN 200,150 SCH 40 in lengths of 12 m
1000 Meters
Georgia
JIS G3454 STPG 370
65A x Sch40 x 6M
1300 PCS x 6mtrs
Panama
API 5L X52
6 inch, thickness: 11.7mm
140Km