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Boiler Tube

Type: Boiler seamless tube, Boiler pipe·······
Application: Boiler, heat exchanger, condenser, and so on high-pressure fluid transmission
OD: 21.3-711mm, WT: 2.3-40mm, L: Fixed Length, SRL, DRL
Standard: ASTM A179, A192, A210, EN10216-1, EN10216-2, JIS 3461, DIN 17175
End: Square/Plain/Beveled/Threaded ends
Surface: Bare, Lightly Oiled, Painting, Zinc/Anti-corrosive Coating
Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped
Availability:


Size

Wall Thickness(mm)

 O.D.(mm)

2

2.5

3

3.5

4

4.5

5

6

6.5-7

7.5-8

8.5-9

9.5-10

11

12

Φ25-Φ28









Φ32









Φ34-Φ36









Φ38









Φ40










Φ42










Φ45









Φ48-Φ60








Φ63.5








Φ68-Φ73









Φ76





Φ80





Φ83





Φ89





Φ95





Φ102





Φ108





Φ114






Φ121






Φ127











Steel Grade

Standard

Application

GB(China)

ASME(USA)

DIN/EN(Euro)

Carbon steel

10
20
20G
20MnG
25MnG

SA-106B
SA-192
SA-210A1
SA106C
SA-210C

PH265GH
P195GH
P235GH
St35.8
St45.8

Economizer tube
Water wall tube

Mo steel

15MoG
20MoG

SA-209 T1
SA-209 T1a
SA-209 T1b

15Mo3
16Mo3

Water wall tube
Superheater tube
Reheater tube

Cr-Mo Steel

12CrMoG
12Cr2MoG
12Cr1MoVG
15CrMoG
10Cr9MoVNb

SA-213 T11 SA-213 T22
SA-213 T24 SA-213 T91
A335 P1  A335 P2
A335 P5  A335P9
A335 P11 

12Cr1MoV
14MoV63
10CrMo910
X10CrMoVNb91
10CrMo5-5, 13CrMo4-5

Superheater tube
Reheater tube

Cr-Mo-W steel

12Cr2MoWVTiB

SA-213 T23 SA-214 T911
SA-213 T92 SA-213 T122
A335 P23 A335 P911
A335 P92 A335 P122

  ---  

Superheater tube
Reheater tube

Austentic Stainless steel

  ---  

AP304  TP304H
TP321 TP321H
TP347 TP347H
TP316 TP316H
S30432 TP310HCbN

  ---  

Superheater tube
Reheater tube


DIN 17175

EN 10216-2

ASTM A335

 St 35.8, I + III 

 P 235 GH, 1 + 2 

 P5 

 15 Mo 3 

 16 Mo 3 

 P 11 

 13 CrMo 44 

 13 CrMo 4-5 

 P22 

 10 CrMo 910 

 10 CrMo 9-10 

 P9 

 X 10 CrMo VNb 9-1 

 X 10 CrMo VNb 9-1 

 P91 

 X 20 CrMo V 12-1 

 X 20 CrMo V 11-1 



Carbon steel for temperature 0° - 100°C

 

EN - DIN 

WNr

AISI/ Tradename

ASTM - UNS

Pipe
seamless

Pipe
welded

P235TR1

 1.0254

-

-

A/ SA53B

A/ SA53B

EN10216-1

EN10217-1

Carbon steel for temperature -20° - 400°C for pressure application

P235GH

1.0345

-

-

A/ SA106 Gr B/ A

A/ SA672 B65

-

-

EN10216-2

EN10217-2/ -5

P265GH

1.0425

-

-

A/ SA106 Gr C/ A

A/ SA672 BB70

-

-

EN10216-2

EN10217-2/ -5

P355N/ NH

1.0562/ 1.0565

-

-

API 5L X52

API 5L X52

-

-

EN10216-3

EN10217-3

P460N/ NH

1.8905/ 1.8935

-

-

API 5L X65

API 5L X65

-

-

EN10216-3

EN10217-3

Low Alloy steel and Alloy Steel for temperature 0° to 650°C for pressure application

16Mo3

1.5415

-

-

A/ SA335 P1

A/ SA691 1CR

-

-

EN10216-2

EN10217-5

X11CrMo5-1

1.7362

-

-

A/ SA335 P5

A/ SA691 5CR

-

-

EN10216-2

EN10217-5

X11CrMo9-1

1.7386

-

-

A/ SA335 P9

A/ SA691 9CR

-

-

EN10216-2

EN10217-5

13CrMo4-5

1.7335

-

-

A/ SA335 P11

A/ SA691 1 1/4CR

-

-

EN10216-2

EN10217-5

10CrMo9-10

1.7380

-

-

A/ SA335 P22

A/ SA691 2 1/4CR

-

-

EN10216-2

EN10217-5

X10CrMoVNb9-1

1.4903

-

-

A/ SA335 P91

A/ SA691 91CR

-

-

EN10216-2

EN10217-5

X10CrWMoVNb9-2

1.4901

-

-

A/ SA335 P92

A/ SA691 92CR

-

-

EN10216-2

EN10217-5

Low temperature carbon steel for pressure purpose and low temp up to -50°C

P215NL

1.0451

-

-

A/ SA333 Gr1/ Gr6

A/ SA671CC60/70 

-

-

EN10216-4

EN10217-4

P255QL

1.0452

-

-

A/ SA333 Gr1/ Gr6

A/ SA671CC60/70 

-

-

EN10216-4

EN10217-4

P265NL

1.0453 

-

-

A/ SA333 Gr1/ Gr6

A/ SA671CC60/70 

-

-

EN10216-4

EN10217-4

P355NL1/ NL2

1.0566

-

-

A/ SA333 Gr6

A/ SA671CC60/70
A/ SA333 Gr6 

-

-

EN10216-3

EN10217-3

Low temperature Nickel Steel for pressure purpose and low temp up to -196°C

X10Ni9/ X8Ni9

1.5682/ 1.5662

-

-

A/ SA333 Gr. 8

A/ SA671C100/ CH100

-

-

EN10216-4

EN10217-4

12Ni14

1.5637

-

-

A/ SA333 Gr3

A/ SA671CF66

-

-

EN10216-4

EN10217-4



boiler-tube-process-flowchart

Boiler steel pipes includes medium pressure boiler pipe and high pressure boiler pipe, it is often manufactured in seamless procedures, welded steel pipe is not applicable.

It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc.

 

Types of boiler tubes

Fire Tube Boiler

Fire-tube boiler is a type of boiler in which hot gas passes from the fire through one or more pipes that pass through a sealed water container. The heat of the gas is transferred through the wall of the tube through heat conduction, heating the water and eventually generating steam. Fire tube boilers are the third of the four historical types of boilers: low-pressure tank or “haystack” boilers, flue boilers with one or two large flues, fire tube boilers and high-pressure boilers with many small tubes

Water Tube Boiler

Water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. The fuel is burned in the furnace to produce hot gas, which heats the water in the steam generation tube. In smaller boilers, the additional power generation tubes are separated in the furnace, while larger utility boilers rely on water injection tubes that make up the furnace wall to generate steam. High-pressure water tube boiler: The hot water then rises into the steam drum. Here, saturated steam is drawn away from the top of the drum.


Boiler Pipe Manufacturing methods

The manufacturing method of medium and high pressure boiler steel pipe is same with the seamless steel pipe, but there are some key manufacturing processes shall be noted:

Fine drawing, surface bright, hot rolling, cold drawn, heat expansion


Heat treatment methods applied in the boiler pipes

Heat treatment is a method of changing the physical properties of high pressure boiler pipe by heating and cooling. Heat treatment can improve the microstructure of high pressure boiler pipe, so as to meet the required physical requirements. Toughness, hardness and wear resistance are obtained by heat treatment. In order to obtain these characteristics, it is necessary to adopt quenching, annealing, tempering and surface hardening.

 

1. Quenching

Hardening, also called quenching, is that high pressure boiler pipe is heated evenly to the appropriate temperature, then quickly immerse in water or oil for rapid cooling, and cooling in the air or in the freezing zone. So that the high pressure boiler pipe can obtain the required hardness.

 

2. Tempering

High pressure boiler pipe will become brittle after hardening. And the stress caused by quenching can make the high pressure boiler pipe tapped and broken. The tempering method can be used to eliminate brittleness. Although the hardness of high pressure boiler pipe is lighter reduced, its the toughness can be increased to reduce the brittleness.

 

3.Annealing

Annealing is the method to eliminate the internal stress of high pressure boiler pipe. The annealing method is that the steel parts need to be heated to the critical temperature, then put in dry ash, lime, asbestos or closed in the furnace, then let it cooling slowly.

We can produce all sizes of boilers tubes,according to European,Chinese,American,Japanese standard.With fast delivery time,supportive payment term.All tubes production processes are controlled strictly.with high level of quality requirement,all tubes are inspection before delivery,and also accept third party inspection before delivery.

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