Seamless vs Welded Carbon Steel Pipe

June 22, 2025

EN8 Chemical Composition

Carbon steel seamless pipe are stronger and durable due to seamless structure which gives potential at fault point. It has standard shape and design which gives consistent mechanical feature for the whole length of pipe. It even gives better resistance at higher temperature due to no joints.

It gives higher accurateness in terms of sizes and thickness which gives more predictable performances in several environments.

Carbon steel welded pipe has less strength and durability as compared to seamless pipe. It is primarily due to the welding process itself. The heat affected area near the weld can come across changes in microstructure and mechanical properties, which may lead to low toughness and resistance to exhaust.

It can leave weld beads and heat affected area patch on its surface, which will need more treatment or cleaning process to meet the desired requirement.

Seamless carbon steel pipe is utilize as follows:

High pressure applications
It is usually preferred for high pressure application, such as in oil and gas industry for moving liquids at higher pressure as there will be no risk of leakages.

Hydraulic System
It is appropriate for this application as it has the potential to hold high pressure and it even has smooth interior surface which decreases adhesion loss.

Critical liquid transport
It is used for critical applications where strength of the pipe is essential, such as in chemical processing, nuclear plants, and power generation industry.

Welded carbon steel pipe is utilize as follows:

Medium pressure and temperature
It is appropriate where medium pressure and temperature are demanded such as low-pressure steam systems.

Non-corrosive Fluids
It is appropriate for moving non-corrosive fluids where there is no risk or minimum risk of corrosion such as for distributing water.

Manufacturing Process

Seamless carbon pipe are manufactured by extruding a solid steel bar in order to make a hollow pipe. It has no joints or welding, that means it has a standard design.

Welded carbon pipe are manufactured by rolling a flat plate and formed into a cylindrical shape and then it is been welded. It is commonly welded by longitudinally welded (LSAW) and spiral welded (SSAW).

Why to select?

Carbon seamless pipe gives superior strength, reliability at higher pressure conditions in essential applications where strength is most essential.

Carbon welded pipe is cost effective, easy to manufacture, and suitable for medium pressure and temperature applications.

Table of contents

  • Carbon Steel seamless and welded pipe manufacturing process
  • Seamless vs Welded Carbon Steel Pipe Specification
  • Carbon steel Welded and seamless pipe equivalent
  • Tolerances for hot finished seamless pipe
  • Tolerances for cold drawn welded tubes
  • Carbon Steel seamless and welded pipes chemical composition
  • CS Welded and Seam Pipe mechanical properties
  • List of documents to import Low Temp Welded Pipe
  • A106 Seamless and Welded Pipe Schedule
  • CS Welded and Seamless Pipe International Standard
  • Hot finished welded type tubes sizes in mm
  • Difference between seamless pipe and erw pipe
  • Maximum Allowed Stress of DIN EN 10220 seamless steel pipes
  • Low Temp Seamless Pipe Charpy V-Notch Impact Tests
  • Hot Forming and Heat Treatment of CS ERW and Seamless pipe
  • List of machinery to produce seamless pipe
  • List of machinery to produce welded pipe
  • Testing for Seam pipe and ERW Pipe

List of Seamless Carbon Steel Pipe grades for high-temperature service, check uses and manufacturing process of CS SMLS and Welded pipes

Carbon Steel seamless and welded pipe manufacturing process

Carbon steel seamless pipe manufacturing process

Carbon steel seamless pipe manufacturing process

Carbon steel welded pipe manufacturing process

Carbon steel welded pipe manufacturing process

Check Carbon Steel welded and seamless pipe specifications, equivalent, tolerances, and properties

Seamless vs Welded Carbon Steel Pipe Specification

Size Range Wall thickness OD
  • Seamless Pipe: 1/2 to 36 ” NB
  • Welded Pipe : 6" to 48"
  • SCH10 – SCH160
  • 2mm to 45mm
 1/2” to 60”
High carbon steel seamless pipe sizes Indian standards Size
  • OD: 10.3- 610mm
  • Wall Thickness: 1.0-40mm
  • Longest length:12000mm
  • IS 1239
  • IS 3589
  • IS 4923
  • IS 3601
  • OD: 21.3-2540mm
  • Wall Thickness: 2.5-20mm
  • Longest length:12000mm
AMS standard Hardness range Maximum operating temperature
  • AMS 6360 (4130)
 767 HB  650°C (1202°F).
Expansion coefficient Joining methods Yield strength
12×10-6/°C
  • Live joint connection
  • Flange connection
  • Special pipe joint connection
 35,000 psi.
Plain carbon steel pipes form Estimated delivery time SWG
  • Coiled
  • Round
  • Straight
  • U Shape
  • Pan Cake Coils
  • Rectangular
  • Square
  • Hollow
  • Generally it is 7-10 days if its in stock
  • 15-20 days if its not in stock
  • Within 7 days to Saudi Arabia
  • 16 Swg.
  • 10 Swg.
  • 12 Swg.
  • 14 Swg.
  • 18 Swg.
  • 20 Swg.
Services Meet the requirements Length
  • Cut-to-length services
  • Machining
  • Threading
  • Welding
  • Beveling
  • ISO 15156
  • MTC EN 10204 3.1/ 3.2 certificate
  • NACE TM-0284
  • IBR
  • HIC tested
  • Sour service
  • NORSOK
  • NACE MR0103
  • NACE MR0175
  • Single
  • Double random
  • Cut length
  • Standard
  • 20FT
  • From 5 – 18 meters
  • DRL
  • SRL
  • 40FT
  • Custom / cut to size
Density Temperature range Melting point
7.85 g/cm3 to 8.05 g/cm3. 2200°F 1425-1540°C (2597-2800°F)
BS standards Black steel CS pipe classification Manufacturing technique
  • BS 3601
  • BS 1965-1
  • BS 1387
  • Low carbon steel: 0.05% – 0.25% carbon
  • Medium carbon steel: 0.25% – 0.5% carbon
  • High carbon steel: 0.5% – less than 2% carbon
  • Hot formed
  • Precision rolled
  • Cold formed
  • Cold drawn
Marking Applications Welding procedure
  • Schedule or wall thickness
  • Specification
  • Identification colour code
  • Material grade
  • Method of manufacturing (Seamless / Welded)
  • Heat number
  • Nominal size
  • Suppliers/ Manufacturers name or custom logo – as requested by buyer
  • Building foundations
  • Transporting wastewater
  • Transporting natural gases or oil
  • Chemical processing
  • Boiler and condenser tubes
  • Gas-shielded tungsten arc (TIG or GTAW)
  • Gas-shielded metal arc (MIG or GMAW)
  • Brazing
  • Tack welding
  • Manual metal arc (MMA or SMAW)
Weight calculator formula Features Certification
  •  Wt/Ft = 10.69*(OD – Wall Thickness)* Wall Thickness
  • Economical price for long diameter steel pipes
  • High hardness
  • Strength
  • Wear resistance
  • Anti-corrosion
  • DFARS compliant
  • MTC EN 10204 3.1, 3.2
  • Heat treatment charts
  • Surface roughness measurement
  • HS code commercial invoice
  • Fumigation certificates
  • Raw materials certificate
  • Third party inspection report
  • Moisture testing report
  • Laboratory test certificate from Govt. approved lab
  • Form a for generalized system of preferences (GSP)
Origin of material Standards Coatings
  • Korea
  • France
  • Italy
  • Europe
  • Japan
  • Indian (Quality Grade A/ B/ C in stock)
  • ASTM A53 B
  • ASTM A179
  • ASTM A135
  • ASTM A106 Gr. B
  • DIN 2440
  • API 5L Gr B to X70
  • ASTM A252
  • ASTM A134
  • ASTM A192
  • CSZ Z245
  • ASTM A333
  • NBR 8261
  • 3LPE/3PE coating
  • Varnished
  • Blacking painting
  • Zinc
  • Polyethylene layers
  • 3pp
  • FBE
  • Clad or Lined alloy steel
  • Soild CRA
Packaging Carbon steel pipe equipment Testing requirements
  • Crates (steel/wooden)
  • Wooden boxes
  • Wrapped in plastic or standard seaworthy export packing
  • Special crates for with each radius separated
  • Bundles (hexagonal)
  • PE fabric bundles
  • Electric bevelling machine
  • Sand-blasting machine
  • Bending machine
  • Pushing machine
  • Press machine
  • Geometric accuracy
  • Radiographic inspection
  • Liquid penetrant examination
  • Hydrotesting
  • And most important dimensional checking
  • Ultrasonic gaging

Carbon steel Welded and seamless pipe equivalent

DIN BS NFA ASTM
DIN 17175 Grade 17 Mn 4 NFAA 49-213 Grade TU 48-c ASTM A106 Grade C ASME SA 106 Grade C

Tolerances for hot finished seamless pipe

Outside Diameter Range
(inches)		 Wall Percent
of O.D.		 Unannealed or Stress
Relief Annealed		 Oil Quenched &
Tempered		 Soft Annealed or
Normalized
O.D. Inches I.D. Inches O.D. & I.D. O.D. Inches I.D. Inches
Plus Minus Plus Minus Plus/Minus Plus Minus Plus Minus
Up to 0.499 All 0.004 0.000 0.005 0.005 0.002
0.500-1.699 All 0.005 0.000 0.000 0.005 0.005 0.007 0.002 0.002 0.007
1.700-2.099 All 0.006 0.000 0.000 0.006 0.008 0.006 0.005 0.005 0.006
2.100-2.499 0.007 0.000 0.000 0.007 0.009 0.008 0.005 0.005 0.008
2.500-2.899 All 0.008 0.000 0.000 0.008 0.010 0.009 0.005 0.005 0.009
2.900-3.299 All 0.009 0.000 0.000 0.009 0.012 0.011 0.005 0.005 0.011
3.300-3.699 All 0.010 0.000 0.000 0.010 0.013 0.013 0.005 0.005 0.013
3.700-4.099 All 0.011 0.000 0.000 0.011 0.014 0.013 0.007 0.010 0.010
4.100-4.499 All 0.012 0.000 0.000 0.012 0.015 0.014 0.007 0.011 0.011
4.500-4.899 All 0.013 0.000 0.000 0.013 0.017 0.016 0.007 0.012 0.012
4.900-5.299 All 0.014 0.000 0.000 0.014 0.018 0.018 0.007 0.013 0.013
5.300-5.549 All 0.015 0.000 0.000 0.015 0.019 0.020 0.007 0.014 0.014
5.550-5.999 Under 6 0.010 0.010 0.010 0.010 0.025 0.018 0.018 0.018 0.018
6 to 7 1/2 0.009 0.009 0.009 0.009 0.023 0.016 0.016 0.016 0.016
Over 7 1/2 0.018 0.000 0.009 0.009 0.023 0.017 0.015 0.016 0.016

Tolerances for cold drawn welded tubes

Size Range
Inch (mm)		 OD Tolerance Inch (mm)
Over Under
Up to 2.999 (76.17) 0.020 (0.51) 0.020 (0.51)
3.000-4.499 (76.20-114.27) 0.025 (0.64) 0.025 (0.64)
4.500-5.999 (114.30-152.37) 0.031 (0.79) 0.031 (0.79)
6.000-7.499 (152.40-190.47) 0.037 (0.94) 0.037 (0.94)
7.500-8.999 (190.50-228.57) 0.045 (1.14) 0.045 (1.14)
9.000-10.750 (228.60-273.05) 0.050 (1.27) 0.050 (1.27)
10.750 and larger 1% 1%

Carbon Steel seamless and welded pipes chemical composition

ASTM A53

Values in % Type S
(Seamless)		 Type F
(Furnace Weld)		 Type E
(ERW)
A53 Grade A Grade B Grade A Grade A Grade B
Manganese 0.95 1.2 1.2 0.95 1.2
Carbon 0.25 0.3 0.3 0.25 0.3
Sulfur 0.045 0.045 0.045 0.045 0.045
Phosphorous 0.05 0.05 0.05 0.05 0.05
Nickel 0.4 0.4 0.4 0.4 0.4
Copper 0.4 0.4 0.4 0.4 0.4
Molybdenum 0.15 0.15 0.15 0.15 0.15
Chromium 0.4 0.4 0.4 0.4 0.4
Vanadium 0.08 0.08 0.08 0.08 0.08

ASTM A106

Element Mn C
max		 S
max		 P
max		 Cr
max (3)		 Si
min		 Mo
max (3)		 Cu
max (3)		 V
max (3)		 Ni
max (3)
Grade A 0.27-0.93 0.25 (1) 0.035 0.035 0.40 0.10 0.15 0.40 0.08 0.40
Grade B 0.29-1.06 0.30 (2) 0.035 0.035 0.40 0.10 0.15 0.40 0.08 0.40
Grade C 0.29-1.06 0.35 (2) 0.035 0.035 0.40 0.10 0.15 0.40 0.08 0.40

ASTM A333

Element Grade 3 Grade 6
C 0.19 0.30
Mn 0.31–0.64 0.29–1.06
P 0.025 0.025
S 0.025 0.025
Si 0.18–0.37 0.10 min
Ni 3.18–3.82 0.40
Cr … 0.30
Cu … 0.40
Al … …
V … 0.08
Cb … 0.02
Mo … 0.12
Co … …

CS Welded and Seam Pipe mechanical properties

ASTM A53

Seamless and ERW A53 Grade B A53 Grade A
Yield Strength 35,000 30,000
Tensile Strength, min, psi 60,000 48,000

ASTM A106

ASTM A106 Grade A Grade B Grade C
Yield Strength, min., psi 30,000 35,000 40,000
Tensile Strength, min., psi 48,000 60,000 70,000

ASTM A333

ASTM A333 Yield Strength, min. Tensile Strength, min. Elongation %, min.
Grade psi MPa psi MPa Longitudinal Transverse
Grade 3 35 000 240 65 000 450 30 20
Grade 6 35 000 240 60 000 415 30 16.5

List of documents to import Carbon Steel Seamless Pipe, check MTC sample for Seamless vs Welded CS Pipe

List of documents to import Low Temp Welded Pipe

Certificate of Origin

Certificate of Origin

Bill of Lading

Bill of Lading

Commercial Invoice

Commercial Invoice

Packing list

Packing list

Material Test Certificate

Material Test Certificate

Insurance Certificate

Insurance Certificate

Refer Weight Chart, Schedule, International Standard, and sizes in mm for Welded and Seamless Carbon Steel Pipe

A106 Seamless and Welded Pipe Schedule

NPS Outside Diameter Inside Diameter Schedules
1/8″ .405 .307 10, 10S
.269 40, STD, 40S
.215 80, XS, 80S
1/4″ .540 .410 10, 10S
.364 40, STD, 40S
.302 80, XS, 80S
3/8″ .675 .545 10, 10S
.493 40, STD, 40S
.423 80, XS, 80S
1/2″ .840 .674 10, 10S
.622 40, STD, 40S
.546 80, XS, 80S
.466 160
.252 XX
3/4″ 1.050 .884 10, 10S
.824 40, STD, 40S
.742 80, XS, 80S
.614 160
.434 XX
1″ 1.315 1.097 10, 10S
1.049 40, STD, 40S
.957 80, XS, 80S
.815 160
.599 XX
1 1/4″ 1.660 1.442 10, 10S
1.380 40, STD, 40S
1.278 80, XS, 80S
1.160 160
.896 XX
1 1/2″ 1.900 1.682 10, 10S
1.610 40, STD, 40S
1.500 80, XS, 80S
1.337 160
1.100 XX
2″ 2.375 2.157 10, 10S
2.067 40, STD, 40S
1.939 80, XS, 80S
1.687 160
1.503 XX
2 1/2″ 2.875 2.635 10, 10S
2.469 40, STD, 40S
2.323 80, XS, 80S
2.125 160
1.771 XX
3″ 3.500 3.260 10, 10S
3.068 40, STD, 40S
2.900 80, XS, 80S
2.624 160
2.300 XX
3 1/2″ 4.000 3.760 10, 10S
3.548 40, STD, 40S
3.364 80, XS, 80S
2.728 XX
4″ 4.500 4.260 10, 10S
4.026 40, STD, 40S
3.826 80, XS, 80S
3.624 120
3.438 160
3.152 XX
4 1/2″ 5.000 4.506 STD, 40S
4.290 XS, 80S
5″ 5.563 5.295 10, 10S
5.047 40, STD, 40S
4.813 80, XS, 80S
4.563 120
4.313 160
4.063 XX
6″ 6.625 6.357 10, 10S
6.065 40, STD, 40S
5.761 80, XS, 80S
5.501 120
5.189 160
4.897 XX
8″ 8.625 8.329 10, 10S
8.125 20
8.071 30
7.981 40, STD, 40S
7.813 60
7.625 80, XS, 80S
7.439 100
7.189 120
7.001 140
6.813 160
6.875 XX
10″ 10.750 10.420 10, 10S
10.250 20
10.136 30
10.020 40, STD, 40S
9.750 60, XS, 80S
9.564 80
9.314 100
9.064 120
8.750 140, XX
8.500 160
12″ 12.750 12.390 10, 10S
12.250 20
12.090 30
12.000 STD, 40S
11.938 40
11.750 XS, 80S
11.626 60
11.376 80
11.064 100
10.750 120, XX
10.500 140
10.126 160
14″ 14.000 13.624 10S
13.500 10
13.375 20
13.250 30, STD, 40S
13.124 40
13.000 XS, 80S
12.814 60
12.500 80
12.124 100
11.814 120
11.500 140
11.188 160
16″ 16.000 15.624 10S
15.500 10
15.375 20
15.250 30, STD, 40S
15.000 40, XS, 80S
14.688 60
14.314 80
13.938 100
13.564 120
13.124 140
12.814 160
18″ 18.000 17.624 10S
17.500 10
17.375 20
17.250 STD, 40S
17.124 30
17.000 XS, 80S
16.876 40
16.500 60
16.126 80
15.688 100
15.250 120
14.876 140
14.438 160
20″ 20.000 19.564 10S
19.500 10
19.250 20, STD, 40S
19.000 30, XS, 80S
18.812 40
18.376 60
17.938 80
17.438 100
17.000 120
16.500 140
16.064 160
24″ 24.000 23.500 10, 10S
23.250 20, STD, 40S
23.000 XS, 80S
22.876 30
22.626 40
22.064 60
21.564 80
20.938 100
20.376 120
19.876 140
19.314 160
30″ 30.000 29.376 10, 10S
29.250 STD, 40S
29.000 20, XS, 80S
28.750 30
36″ 36.000 35.376 10
35.250 STD, 40S
35.000 XS, 80S
34.750 30
48″ 48.000 47.250 STD, 40S
47.000 XS, 80S

CS Welded and Seamless Pipe International Standard

Product Name Standard
Electric-Resistance-Welded Steel Pipes ASTM A135
ERW and Hot-dip Galvanized Steel Pipes ASTM A53
Pipes for Piling Usage ASTM A252
Tubes for General Structural Purpose ASTM A500
CS Tubes for General Structure Purpose JIS G3444
Carbon Steel Tubes for Machine Structure Purpose JIS G3445
CS Pipes for Ordinary Piping JIS G3452
Carbon Steel Pipes for Pressure Service JIS G3454
Carbon Steel Rectangular Pipes for General Structure JIS G3466

Hot finished welded type tubes sizes in mm

Outside Diameter (MM) Wall Thickness (MM) BWG
4.78 0.89 20
6.35 0.51
0.71 22
0.89 20
1.25 18
1.65 16
7.95 0.89 20
1.25 18
9.53 0.71 22
0.89 20
1.25 18
1.65 16
12.7 0.89 20
1.25 18
1.65 16
15.88 0.89 20
1.25 18
1.65 16
19.05 0.89 20
1.25 18
1.65 16
2.11 14
3.05 11
22.23 0.89 20
1.25 18
1.65 16
3.05 11
25.4 0.89 20
1.25 18
1.65 16
2.11 14
2.41 13
3.05 11
28.58 1.65 16
31.75 1.65 16
2.11 14
3.05 11
34.93 0.89 20
38.1 1.25 18
1.65 16
2.11 14
3.05 11
44.45 0.89 20
1.65 16
2.11 14
47.63 1.65 16
50.8 1.25 18
1.65 16
2.11 14
3.05 11
53.98 1.65 16
57.15 1.65 16
2.11 14
3.05 11
63.5 1.65 16
2.11 14
3.05 11
69.85 1.65 16
76.2 1.25 18
1.65 16
2.11 14
3.05 11
82.55 1.65 16
3.05 11
88.9 1.65 16
101.6 1.65 16
2.11 14
108 3.05 11
114.3 1.65 16
127 1.65 16
2.11 14
3.05 11
4.78
152.4 1.65 16
2.11 14
3.05 11
203.2 3.05 11
Price list vary as per the Origin of material and manufacturing method, check price comparison of top 10 manufacturers of Seamless Carbon Steel Pipes

Difference between seamless pipe and erw pipe

ERW Pipe Seamless Pipe
Manufactured by rolling metal and then welding Manufactured by extruding the metal
It has welded joint in its cross-section It does not have any welded joint
Its manufactured from Strip or Coil Its manufactured from solid round billets

Maximum Allowed Stress of DIN EN 10220 seamless steel pipes

NPS OD SCH WT Temp. (°C) Temp. (°C) Temp. (°C)
343 371 204 260 399 427
1/2 21.3 STD 40 2.77 29.3 28.5 34.5 32.6 22.4 18.6
3/4
26.7
 STD 40 2.87 23.8 23.1 28.1 26.5 18.2 15.1
XS 80 3.91 33.5 32.5 39.4 37.2 25.6 21.3
1
33.4
 STD 40 3.38 22.3 21.7 26.3 24.8 17.1 14.2
XS 80 4.55 30.9 30 36.3 34.3 23.6 19.6
1 1/4
42.2
 STD 40 3.56 18.4 17.8 21.6 20.4 14.1 11.7
XS 80 4.85 25.6 24.9 30.2 28.5 19.6 16.3
160 6.35 34.5 33.5 40.6 38.4 26.4 21.9
1 1/2
48.3
 STD 40 3.68 16.5 16 19.4 18.4 12.6 10.5
XS 80 5.08 23.3 22.6 27.4 25.9 17.8 14.8
160 7.14 33.8 32.8 39.8 37.6 25.9 21.5
2
60.3
 STD 40 3.91 13.9 13.5 16.4 15.5 10.7 8.9
XS 80 5.54 20.1 19.5 23.7 22.4 15.4 12.8
160 8.74 33.1 32.1 38.9 36.8 25.3 21
2 1/2
73
 STD 40 5.16 15.3 14.8 17.9 17 11.7 9.7
XS 80 7.01 21.1 20.5 24.8 23.5 16.1 13.4
160 9.53 29.5 28.6 34.7 32.8 22.5 18.7
3
88.9
 STD 40 5.49 13.2 12.8 15.6 14.7 10.1 8.4
XS 80 7.62 18.7 18.2 22 20.8 14.3 11.9
160 11.13 28.1 27.3 33.1 31.3 21.5 17.9
4
114.3
 STD 40 6.02 11.2 10.9 13.2 12.5 8.6 7.1
XS 80 8.56 16.2 15.7 19.1 18 12.4 10.3
120 11.13 21.4 20.8 25.2 23.8 16.4 13.6
160 13.49 26.4 25.6 31 29.3 20.2 16.8
XXS 17.12 34.3 33.3 40.4 38.2 26.2 21.8
5
141.3
 STD 40 6.55 9.8 9.5 11.6 10.9 7.5 6.2
XS 80 9.53 14.5 14.1 17.1 16.1 11.1 9.2
120 12.7 19.7 19.1 23.1 21.9 15 12.5
160 15.88 25 24.3 29.4 27.8 19.1 15.9
XXS 19.05 30.5 29.6 35.9 33.9 23.4 19.4
6
168.3
 STD 40 7.11 8.9 8.7 10.5 9.9 6.8 5.7
XS 80 10.97 14 13.6 16.5 15.6 10.7 8.9
120 14.27 18.5 17.9 21.8 20.6 14.1 11.7
XXS 160 18.26 24.1 23.4 28.3 26.8 18.4 15.3

Low Temp Seamless Pipe Charpy V-Notch Impact Tests

Specimen Size *A *B
mm ft·lbf J ft·lbf J
10 by 10 13 18 10 14
10 by 7.5 10 14 8 11
10 by 6.67 9 12 7 9
10 by 5 7 9 5 7
10 by 3.33 5 7 3 4
10 by 2.5 4 5 3 4

Hot Forming and Heat Treatment of CS ERW and Seamless pipe

Heat treatment Hot forming
Normalizing 1) Stress-relieving anneal 2) Type of cooling Temperature °C Type of cooling
890 – 950 °C 600 – 650 °C Air 1100 – 950 Air

List of machinery to produce seamless pipe

  • Piercing Mill
  • Slight-stretch Reducing Mill
  • Rotating Heat Furnace
  • Cooling Bed
  • Hot Rolling Mill
  • Tube Cutter

List of machinery to produce welded pipe

  • Decoiler + Hydraulic Feeding table
  • Leveling unit
  • Hydraulic Puncher Unit
  • Roll Forming Machine
  • Hydraulic Pump Station for mail machine
  • Electricity control cabinet
  • Cutting precision

Testing for Seam pipe and ERW Pipe

  • Chemical composition analysis
  • Surface quality inspection
  • Ultrasonic testing
  • Eddy current flaw detection
  • Magnetic particle testing
  • Penetration inspection
  • Tensile test
  • Hardness test
  • Hydraulic test

Component Parts

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