8615824687445
sales@gneetube.com
enLanguage

Seamless Boiler Pipe

Gnee environment
 
 

Why choose GNEE boiler steel pipe?

GNEE Company covers an area of 35,000 square meters and has more than 200 employees, including 80 technicians. We have established an effective and complete quality control and assurance system. The company has also obtained ISO9001 quality system certification.
Main production and business products
Carbon steel pipe, alloy steel pipe. Our pipes include liquid delivery pipes, structural pipes, hydraulic strut pipes, boiler pipes and bearing pipes.
Steel pipe inventory
We normally have over 5,00000 tons of pipes in various sizes and standards. Our stock pipe sizes range from 20mm to 406mm outside diameter and 2mm to 70mm wall thickness.

 
35000+

Square Meters Built

 
18+

years experience

 
600+

Cooperating Partner

 
200+

Enterprise Employees

 

First 1234567 Last

GNEE's main business is boiler tubes

Product Type:Seamless boiler pipe, Boiler Seamless Tube, Seamless Boiler Tube, Boiler Pipe

GB

GB 3087: Seamless steel tubes for low and medium pressure boiler

GB 5310: Seamless steel tube for high pressure boiler

GB 13296: Seamless steel tubes for boilers and heat exchangers

GB 6479: Seamless steel tubes for high-pressure chemical fertilizer equipment

GB 9948: Seamless steel tubes for petroleum cracking

ASME
ASME SA-106: Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
ASME SA-192M: Seamless Carbon Steel Boiler Tubes for High Pressure
ASME SA-209M: Seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
ASME SA-210M: Seamless Medium-carbon Steel Boiler and Superheater Tubes
ASME SA-213M: Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
ASME SA178: Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater

ASTM
ASTM A213: Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
SA213-T2: ASME SA213 T2 has allowable stresses listed up to 1000F in the ASME Boiler Code.
SA213-T9
SA213-T12: Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, Heat-Exchanger Tubes.
SA213-T11: The tubes are used in heat exchangers, super heaters and in boilers.
SA213-T22: ASM T22 Boiler Tube is a high temperature tolerance tube that is used in acidic and corrosive environments such as the hydrochloric processing and in aluminum chloride catalyst involving applications.
ASTM A 106M: Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A192M: Seamless Carbon Steel Boiler Tubes for High Pressure
ASTM A210M: Seamless Medium-carbon Steel Boiler and Superheater Tubes
ASTM A 335M: Seamless ferritic alloy-steel pipe for high-temperature service

EN
EN 10216-2 : Seamless steel tubes for pressure purposes
DIN
DIN 17175:Seamless Tubes of Heat-resistant Steels - Technical Conditions of Delivery
JIS
JIS G3461: Carbon steel boiler and heat exchanger tubes
JIS G3462: Alloy steel boiler and heat exchanger tubes
JIS G3463: Stainless Steel for Boiler and Heat Exchanger Tubes


Outer Diameter (OD): 13.72-914.4mm
Wall Thickness(WT): 1.65-22mm
Lenght: 0.5mtr-20mtr
Pipe Standard:ASTM A192 ASTM A179 ASTM A556 ASTM A210 ;EN10216/BS3059;JIS G3454/G3456/G3461 ;A213 T5，T9，T11，T22，T91

Application: Used for superheated pipelines, steam pipeline, boiling water tube
 

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.

A213 seamless pipe
ASTM A213 Alloy Steel Pipe
ASTM A179 Seamless Carbon Steel Tube
ASTM A179 Boiler Tube
ASTM A210 Gr. A1 Tube
ASTM A210 Boiler Tube
ASTM A192 Carbon Steel Tube
 A192  Boiler Tube

Specification

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

 

 

 

 

 

●

●

●

●

●

●

●

●

●

 

APPLICATION

Boiler tube uses
1. Power plants: In power plants, boiler tubes are mainly used in the boiler system of the power station to transfer the gas heated by the fuel to the steam turbine. Boiler tubes are also used to transport steam and water to keep them functioning throughout the power generation process.
2. Chemical industry: In the chemical industry, boiler tubes are used to transport liquid and gaseous fluids, such as oil, natural gas, chemicals, etc.
3. Petroleum industry: Boiler tubes are often used to transport oil and natural gas. In the process of petroleum processing, a boiler is needed to heat the crude oil to a certain temperature, then compress the gas into a liquid state, and finally use boiler tubes to transport it to where it is needed.
4. Construction industry: Boiler tubes are also often used in HVAC systems of buildings to heat the gas to a certain temperature to maintain the comfortable temperature of the building.

Power plants
Power plants
Chemical industry
Chemical industry
Petroleum industry
Petroleum industry
Construction industry
Construction industry

MANUFACTURING METHOD

Boiler tube manufacturing methods
The manufacturing method of medium and high pressure boiler steel pipes is the same as that of seamless steel pipes, but there are some key manufacturing processes that need to be noted:
Fine drawing, bright surface, hot rolling, cold drawing, hot expansion
Application of heat treatment methods in boiler pipes
Heat treatment is a method of changing the physical properties of high-pressure boiler tubes through heating and cooling. Heat treatment can improve the metallographic structure of high-pressure boiler tubes to meet the required physical requirements. Toughness, hardness and wear resistance are obtained through heat treatment. In order to obtain these properties, quenching, annealing, tempering and surface hardening must be used.
1. Quenching
Quenching, also known as quenching, is to heat the high-pressure boiler tubes evenly to the appropriate temperature, then quickly immerse them in water or oil to quickly cool them in the air or in a freezing zone. To obtain the required hardness of high-pressure boiler tubes.
2. Tempering
High-pressure boiler tubes become brittle as they harden. The stress generated by quenching can cause high-pressure boiler tubes to be tapped and broken. Tempering can be used to eliminate brittleness. Although the hardness of high-pressure boiler tubes is reduced slightly, its toughness can be increased to reduce brittleness.
3. Annealing
Annealing is a method to eliminate stress within high-pressure boiler tubes. The annealing method is to heat the steel to a critical temperature, then put dry ash, lime, asbestos or enclosed in a furnace, and then let it cool slowly.

Boiler tube manufacturing methods

 

BOILER STEEL TUBE TESTING


The Steel Pipe Should Be Tested Hydraulically One By One. The Maximum Test Pressure Is 20 MPa. Under The Test Pressure, The Stabilization Time Should Be Not Less Than 10 S, And The Steel Pipe Should Not Leak.
After The User Agrees, The Hydraulic Test Can Be Replaced By Eddy Current Testing Or Magnetic Flux Leakage Testing.
Nondestructive Test：
Pipes That Require More Inspection Should Be Ultrasonically Inspected One By One. After The Negotiation Requires The Consent Of The Party And Is Specified In The Contract, Other Non-Destructive Testing Can Be Added.
Flattening Test：
Tubes With An Outer Diameter Greater Than 22 Mm Shall Be Subjected To A Flattening Test. No Visible Delamination, White Spots, Or Impurities Should Occur During The Entire Experiment.
Hardness Test:
For Pipe Of Grades P91, P92, P122, And P911, Brinell, Vickers, Or Rockwell Hardness Tests Shall Be Made On A Specimen From Each Lot
Bend Test:
For Pipe Whose Diameter Exceeds NPS 25 And Whose Diameter To Wall Thickness Ratio Is 7.0 Or Less Shall Be Subjected To The Bend Test Instead Of The Flattening Test. Other Pipe Whose Diameter Equals Or Exceeds NPS 10 May Be Given The Bend Test In Place Of The Flattening Test Subject To The Approval Of The Purchaser

Nondestructive Test
Nondestructive Test
Flattening Test
Flattening Test
Hardness Test
Hardness Test
Bend Test
Bend Test

DELIVERY

Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

Term Symbol Explanation
Cold-finished/hard (cold-finished as-drawn) BK No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked) BKW After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed GBK After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized NBK The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

 

GNEE PACKAGING AND SHIPPING

Transportation
Choose the right shipping method:
Due to the size and weight of boiler steel pipes, specialized transportation vehicles such as flatbed trucks or containers are usually required.
For long-distance transportation, shipping containers are a common and safe choice because they offer protection from water, vibration, and impact.
Choose the right packaging material:
The choice of packaging material is critical to protecting steel pipes. Common packaging materials include wooden pallets, wooden boards, foam plastics, and stretch film.
These packaging materials can effectively protect steel pipes from vibration, collision and moisture erosion during transportation.
For secure packaging:
When using a wooden pallet, place the steel pipe on the pallet and secure it with straps or steel cables to prevent movement during transportation.
Use stretch film to secure the steel pipe to the pallet or packaging material to provide extra stability.
Anti-rust treatment:
Since boiler steel pipes are susceptible to moisture and rust, they should be rust-proofed before packaging, such as painting with anti-rust oil or spraying with anti-rust agents.

Gnee Packaging and shipping
 
Gnee Packaging and shipping
 
Gnee Packaging and shipping
 
Gnee Packaging and shipping
 
FAQ

Q: What is the temperature range of ASTM A192?

A: Boiler tubes made of ASTM A192 steel can be used in applications complying with the ASME Boiler and Pressure Vessel Code with maximum temperature limits of 538°C, 538°C and 343°C,

Q: What is A179 boiler tube?

A: ASTM A179 Seamless Boiler Tubes are manufactured in cold-drawn seamless, material in low carbon steel for heat exchanger and condenser.

Q: What is ASTM 210 boiler tube?

A: ASTM A210 is the standard covers seamless medium-carbon steel boiler and superheater tubes. Seamless medium carbon steel pipe for boiler tube and boiler flue pipe, including a minimum wall thickness of the security side, the dome and the support tube and superheater tubes.

Q: What is sa209 T1a boiler tube?

A:ASME SA 209 Grade T1a Alloy Steel Seamless Tubes are Carbon Steel Tubes with subsequent addition of chromium, molybdenum and sometimes vanadium are known as chrome moly Tubes. ASME Specification alloy steel Tubes are used for high temperature service applications.

Q: Hardness testing methods of high-pressure boiler tubes？

A: The hardness testing methods of high-pressure boiler tubes mainly include Vickers hardness or Rockwell hardness testing methods.

Q: Why boiler use Finned Tubes?

A: The structural design of the fin tube causes the heat transfer medium to form turbulent flow when flowing in the tube, thereby enhancing the heat transfer effect and improving the heat exchange efficiency and heat dissipation performance of the equipment.

Q: How can I learn about your quality assurance?

A: Visiting our factory is the best way to understand each other.

Q: Can you provide samples?

A: We can provide them for free, you need to bear the shipping cost.

Q: What is your lead time?

A: We have enough stock every day, so for regular sizes, we only need about 7 days stock. If you if you want to order special size, we need new product production time.

Q:Can we visit your factory?

A: Of course you can. We welcome you to visit our factory, check our production line and learn more about our strength and quality.

We're well-known as one of the leading seamless boiler pipe manufacturers and suppliers in China. If you're going to buy discount seamless boiler pipe in stock, welcome to get quotation and free sample from our factory. Also, customized service is available.

A213 T21 T22 Seamless Alloy Pipe, TP347 stainless steel pipe, Stainless steel and high temperature pipes