Seamless bolier pipes

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Seamless bolier pipes

seamless bolier pipes
seamless bolier pipes
seamless bolier pipes

Product: Seamless Boiler Pipe, Seamless Boiler Tube，Boiler Pipe, Boiler Steel Pipe, Seamless Boiler Tubes, Carbon Steel Boiler Tube, Boiler Heat Pipe, Stainless Steel Boiler Pipe, Boiler Seamless Steel Pipe, High Pressure Boiler Tube

Application: Used For Superheated Pipelines, Steam Pipeline, Boiling Water Tube

Specification:

Outer Diameter (Od): 13.72-914.4mm

Wall Thickness(Wt): 1.65-22mm

Length: 0.5mtr-20mtr

Pipe Standard: Astm A179, Astm A192, Astm A210, Astm A213, Grade T2/T5/T9/T11/T12/T22/T23/T24/T36/T9; En10216/Bs3059; Jis G3454/G3456/G3461

End: Square Ends/Plain Ends (Straight Cut, Saw Cut, Torch Cut),Beveled/Threaded Ends

Surface: Black Painting/Oil Painting/Anti-Rust Oil/Anti-Corrosive Coating

Packing: Bundled,Plastic Caps Plugged,Waterproof Paper/Bag Wrapped

  • Description
  • 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 withMaterial 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 seafreight-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

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seamless bolier pipes,Pipe tee,Oil country tubular goods,Electric resistance welded

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