Seamless Boiler Tube

Forever Steel Manufacturing Co., Ltd
seamless boiler tube,boiler tube,high pressure boiler tube,ASTM A192 tube,ASTM A210 tube,ASTM A213 tube

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Seamless Boiler Tube

seamless bolier pipes
High pressure seamless boiler pipe ASTM A192 for power plant steam systems
ASTM A210 Grade C seamless boiler tubing with high temperature resistance

Product Name: Seamless Boiler Tube, High Pressure Boiler Tube
Applications: Superheated pipelines, steam pipelines, boiling water tubes and boiler systems
Outer Diameter: 13.72 mm - 914.4 mm
Wall Thickness: 1.65 mm - 22 mm
Length: 0.5 m - 20 m
Standards: ASTM A179, ASTM A192, ASTM A210, ASTM A213, EN 10216, BS 3059, JIS G3454, JIS G3456, JIS G3461
Grades: T2, T5, T9, T11, T12, T22, T23, T24, T36, T91
Ends: Square end, plain end, beveled end, threaded end
Surface: Black painting, oil painting, anti-rust oil, anti-corrosion coating
Packing: Bundled, plastic caps plugged, waterproof paper or bag wrapped




  • Overview
  • Specification
  • Standard
  • Process
  • Packing

Seamless (SMLS) Boiler Pipes & Tubes

Our high-performance seamless boiler pipes are engineered to withstand extreme pressures and elevated temperatures in critical energy infrastructure. Manufactured via hot-finished or cold-drawn processes, these pipes ensure maximum safety and thermal efficiency for global industrial applications.


1. Technical Specifications

We provide a comprehensive range of dimensions to meet diverse engineering requirements:

Outside Diameter (OD):6 mm – 762 mm (1/4" to 30")

Wall Thickness (WT):1 mm – 120 mm (SCH 10 to SCH XXS)

Length:5.8m, 6m, 11.8m, 12m, or Customized (up to 18m for specific boiler projects)

Ends:Plain end, Beveled end, or Threaded with coupling.


2. Common Standards & Steel Grades

We supply pipes strictly adhering to international standards, ensuring full traceability with Material Test Certificates (MTC) according to EN 10204 3.1/3.2.

Material Category

Standard

Common Grades

Carbon Steel

ASTM A192 / ASME SA192

Low Carbon High-Pressure


ASTM A179 / ASME SA179

Low Carbon (Heat Exchangers)


ASTM A106 / ASME SA106

Grade B, Grade C


ASTM A210 / ASME SA210

Grade A1, Grade C

Alloy Steel

ASTM A213 / ASME SA213

T11, T12, T22, T91, T92


ASTM A335 / ASME SA335

P11, P22, P91, P92


3. Key Applications

Designed for the most demanding thermal environments, our SMLS boiler pipes are regularly used in:

Power Generation:Superheaters, reheaters, and main steam pipelines.

Petrochemical:Heat exchangers, condensers, and furnace tubes.

Industrial Boilers:Economizers, water wall panels, and headers.

Oil & Gas:High-pressure steam injection and refinery processing lines.


4. Packing & Export Protection

To ensure the integrity of the material during maritime transit, we utilize professional export-standard packaging:

Surface Treatment:Black painting, anti-rust oil, or varnish coating to prevent corrosion.

End Protection:Plastic pipe caps on both ends to protect threads and internal surfaces.

Bundling:Hexagonal bundles secured with strong steel strips.

Container Loading:Handled with nylon slings to avoid surface scratches; internal bracing and sea freight-ready wooden crates for thin-walled tubes (ASTM A179/A192).

Boiler SMLS pipes size table

Nominal Nominal Outside Wall Thickness (mm)
diameter (A) diameter (B) diameter (mm) 2.8 3 3.5 4 5 6 7 8 9 10 11 12 13 14 15 17 20 25 30 35 40 45
25 1 34 • • • • • •                                
25 1 38.1 • • • • • •                                
40 1 1/2 48.6 • • • • • • •                              
50 2 60.5 • • • • • • • • • • •                      
65 2 1/2 76.3 • • • • • • • • • • • • • •                
80 3 89.1   • • • • • • • • • • • • • • •            
100 4 114.3     • • • • • • • • • • • • • • •          
100 4 -120       • • • • • • • • • • • • • •          
125 5 139.8       • • • • • • • • • • • • • • •        
150 6 165.2       • • • • • • • • • • • • • • • •      
150 6 168.3       • • • • • • • • • • • • • • • • • •  
- 7 193.7         • • • • • • • • • • • • • • • • • •
200 8 219.1         • • • • • • • • • • • • • • • • • •
250 10 273           • • • • • • • • • • • • • • • • •
300 12 323.9             • • • • • • • • • • • • • • • •
350 14 355.6               • • • • • • • • • • • • • • •
400 16 406.4                 • • • • • • • • • • • • • •
450 18 457.2                   • • • • • • • • • • • • •
500 20 508                     • • • • • • • • • • • •
550 22 558.8                       • • • • • • • • • • •
600 24 609.6                         • • • • • • • • • •


Table 1 ASTM A213 Steel Tubes Outside Diameter and Wall Thickness Tolerance

Item Range (OD, mm) Tolerance
OD Tolerance < 25.4 +/- 0.10
25.4 - <= 38.1 +/- 0.15
> 38.1 - < 50.8 +/- 0.20
50.8 - < 63.5 +/- 0.25
63.5 - < 76.2 +/- 0.30
76.2 - <= 101.6 +/- 0.38
> 101.6 - <= 190.5 +0.38 / -0.64
> 190.5 - <= 228.6 +0.38 / -1.14
WT Tolerance <= 38.1 +20% / -0
> 38.1 +22% / -0

Table 2 ASTM A213 Alloy Steel Tube Chemical Composition (%, max)

Steel Grade ASTM A213 Alloy Steel Tube Chemical Composition (%, max)
C Si Mn P, S (Max) Cr Mo
T2 0.10~0.20 0.10~0.30 0.30~0.61 0.025 0.50~0.81 0.44~0.65
T11 0.05~0.15 0.50~1.00 0.30~0.60 0.025 1.00~1.50 0.44~0.65
T12 0.05~0.15 Max 0.5 0.30~0.61 0.025 0.80~1.25 0.44~0.65
T22 0.05~0.15 Max 0.5 0.30~0.60 0.025 1.90~2.60 0.87~1.13
T91 0.07~0.14 0.20~0.50 0.30~0.60 0.02 8.0~9.5 0.85~1.05
T92 0.07~0.13 Max 0.5 0.30~0.60 0.02 8.5~9.5 0.30~0.60


Table 3 ASTM A213 Alloy Steel Tube Mechanical Properties

Steel Grade ASTM A213 Alloy Steel Tube Mechanical Properties
T. S (MPa) Y. P (MPa) Elongation Hardness (HBW/HRB)
T2 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T11 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T12 ≥ 415 ≥ 220 ≥ 30% 163HBW (85HRB)
T22 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T91 ≥ 585 ≥ 415 ≥ 20% 250HBW (25HRB)
T92 ≥ 620 ≥ 440 ≥ 20% 250HBW (25HRB)

Boiler Seamless Pipe Standards

Application Common Standard Material Type
High-Pressure Boiler Tubes ASTM A192 Carbon Steel
Heat Exchanger Tubes ASTM A179 Low-Carbon Steel
High-Temp Steam Pipe ASTM A106 Carbon Steel
Superheater/Reheater Tubes ASTM A213 Alloy Steel (T-Grades)
Main Steam Line Piping ASTM A335 Alloy Steel (P-Grades)

Boiler Pipe Production Process

Boiler SMLS pipes size table

Nominal Nominal Outside Wall Thickness (mm)
diameter (A) diameter (B) diameter (mm) 2.8 3 3.5 4 5 6 7 8 9 10 11 12 13 14 15 17 20 25 30 35 40 45
25 1 34 • • • • • •                                
25 1 38.1 • • • • • •                                
40 1 1/2 48.6 • • • • • • •                              
50 2 60.5 • • • • • • • • • • •                      
65 2 1/2 76.3 • • • • • • • • • • • • • •                
80 3 89.1   • • • • • • • • • • • • • • •            
100 4 114.3     • • • • • • • • • • • • • • •          
100 4 -120       • • • • • • • • • • • • • •          
125 5 139.8       • • • • • • • • • • • • • • •        
150 6 165.2       • • • • • • • • • • • • • • • •      
150 6 168.3       • • • • • • • • • • • • • • • • • •  
- 7 193.7         • • • • • • • • • • • • • • • • • •
200 8 219.1         • • • • • • • • • • • • • • • • • •
250 10 273           • • • • • • • • • • • • • • • • •
300 12 323.9             • • • • • • • • • • • • • • • •
350 14 355.6               • • • • • • • • • • • • • • •
400 16 406.4                 • • • • • • • • • • • • • •
450 18 457.2                   • • • • • • • • • • • • •
500 20 508                     • • • • • • • • • • • •
550 22 558.8                       • • • • • • • • • • •
600 24 609.6                         • • • • • • • • • •


Table 1 ASTM A213 Steel Tubes Outside Diameter and Wall Thickness Tolerance

Item Range (OD, mm) Tolerance
OD Tolerance < 25.4 +/- 0.10
25.4 - <= 38.1 +/- 0.15
> 38.1 - < 50.8 +/- 0.20
50.8 - < 63.5 +/- 0.25
63.5 - < 76.2 +/- 0.30
76.2 - <= 101.6 +/- 0.38
> 101.6 - <= 190.5 +0.38 / -0.64
> 190.5 - <= 228.6 +0.38 / -1.14
WT Tolerance <= 38.1 +20% / -0
> 38.1 +22% / -0

Table 2 ASTM A213 Alloy Steel Tube Chemical Composition (%, max)

Steel Grade ASTM A213 Alloy Steel Tube Chemical Composition (%, max)
C Si Mn P, S (Max) Cr Mo
T2 0.10~0.20 0.10~0.30 0.30~0.61 0.025 0.50~0.81 0.44~0.65
T11 0.05~0.15 0.50~1.00 0.30~0.60 0.025 1.00~1.50 0.44~0.65
T12 0.05~0.15 Max 0.5 0.30~0.61 0.025 0.80~1.25 0.44~0.65
T22 0.05~0.15 Max 0.5 0.30~0.60 0.025 1.90~2.60 0.87~1.13
T91 0.07~0.14 0.20~0.50 0.30~0.60 0.02 8.0~9.5 0.85~1.05
T92 0.07~0.13 Max 0.5 0.30~0.60 0.02 8.5~9.5 0.30~0.60


Table 3 ASTM A213 Alloy Steel Tube Mechanical Properties

Steel Grade ASTM A213 Alloy Steel Tube Mechanical Properties
T. S (MPa) Y. P (MPa) Elongation Hardness (HBW/HRB)
T2 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T11 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T12 ≥ 415 ≥ 220 ≥ 30% 163HBW (85HRB)
T22 ≥ 415 ≥ 205 ≥ 30% 163HBW (85HRB)
T91 ≥ 585 ≥ 415 ≥ 20% 250HBW (25HRB)
T92 ≥ 620 ≥ 440 ≥ 20% 250HBW (25HRB)

Boiler Seamless Pipe Standards

Application Common Standard Material Type
High-Pressure Boiler Tubes ASTM A192 Carbon Steel
Heat Exchanger Tubes ASTM A179 Low-Carbon Steel
High-Temp Steam Pipe ASTM A106 Carbon Steel
Superheater/Reheater Tubes ASTM A213 Alloy Steel (T-Grades)
Main Steam Line Piping ASTM A335 Alloy Steel (P-Grades)

Boiler Pipe Production Process

Relevant Products

Seamless Boiler Tube Supplier,ASTM A192 A210 A213

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