Hot Rolled STB340 Seamless Steel Tube Carbon Steel for Steam Boilers

• After-sales Service: Yes
• Warranty: Yes
• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Model NO.: JIS G3461 STB340
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Mining
• Section Shape: Round
• Delivery Time: 15-21days
• Sample: Free Provide
• Product Name: JIS G3461 STB340 Boiler Tube
• Product Type: Boiler Tube
• Wall Thickness: 1mm----600mm
• Transport Package: Standard Export Packing
• Specification: 10mm-600mm
• Trademark: BW
• Origin: China
• HS Code: 730419
• Production Capacity: 50000tons/Month

Product Description

Product Description

JIS G3461 STB 340 Boiler and Heat Exchanger Tubes are manufacture by Seamless , Electric resistance welded.The cold finished electric resistance welded steel tube which has been normalized prior to cold finishing may be finished by annealing.

Standard: JIS G3461

Carbon Steel Tubes for Boiler and Heat Exchanger
 
JIS G3461 STB 340 specifies the carbon steel tubes, hereinafter referred to as the "tubes", used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc. of the boiler, and heat exchanger tubes, condenser tubes, catalyzer tubes, etc. used in chemical and petroleum industries.

JIS G3461 STB 340 Boiler and Heat Exchanger Tubes Quick Details
Manufacture:Seamless; Electric resistance welded, Cold finished ,Hot finished
Wall thickness(WT): 2.0 mm--12.7 mm.
Outer diameter (OD): 25 mm--139.8 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded

STB340  
Chemical composition, standards and properties

Grade :	STB340
Classification:	Structural steel   Carbon steel
Standards:	JIS G 3461 :   Carbon steel boiler and heat exchanger tubes
Applications:	Carbon steel tubes used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes and air preheater tubes of the boiler and heat exchanger tubes, condenser tubes and condenser tubes and catalyse

Chemical composition % of grade   STB340

C	Si	Mn	P	S
max   0.18	max   0.35	0.3 - 0.6	max   0.035	max   0.035

Mechanical properties of grade STB340

Assortment	Yield point or Proof stress	Tensile strength	Elongation	Reduction of area	Charpy impact strength
-	N/mm ^2	N/mm ^2	%	%	J/cm ^2
Tubes	175	340	27-35

Hardness of grade STB340

-	Brinell HBW / HB	Rockwell C HRC	Rockwell B HRBS / HRB	Vickers HV
STB340			77

Density of grade STB340

Density

7850   Kg / m^3

Compare other grades with grade STB340

STB340 standards

JIS G 3461 :   Carbon steel boiler and heat exchanger tubes   /   Compare steels

 

Detailed Photos

Production process

Equipment

Application

JIS G3461 STB340 used for economizer, heat exchanger and so on.

Economizer tube is an important part of boiler economizer, mainly made of seamless steel tube by bending or folding. The cast iron economizer consists of a series of horizontal cast iron pipes which are flanged at each end with cast iron elbows. The tubular economizer consists of a series of parallel serpentine tubes. The serpentine tubes are made of seamless steel tubes with an outside diameter of 25 ~ 42 mm. The tubes are usually arranged in staggered rows.

Modern large and medium-sized boilers generally use membrane water wall, which is composed of rolled fin tubes, the fins of adjacent tubes are connected, and welded into a whole by electric welding. The advantages of membrane water wall are: good sealing of furnace, reduce air leakage, reduce smoke loss, and facilitate micro-positive pressure combustion; It can fully protect the furnace wall, so the thickness and weight of the furnace wall can be reduced, which is conducive to the use of suspension structure; Can improve the coking situation in the furnace; The pre-combination degree of boiler components is improved and the installation workload can be reduced. Compared with the water wall of the pipe, the heat absorption capacity of the pipe is improved. Therefore, most boilers produced in recent years use film water wall. Membrane water wall requires that the thermal deviation between adjacent pipes should be as small as possible to prevent thermal stress caused by thermal deviation, resulting in pipe damage. In order to withstand deflaring pressure in the furnace or combustion pressure fluctuation in the furnace, resulting in deformation or damage to the structure of the water wall, rigid beams must be arranged in layers around the outside of the furnace wall, so that the whole water wall becomes a rigid whole.

 

Testings
(1)Chemical Analysis
(2)Tensile Test
(3)Flattening Test
(4) Flaring Test
(5) Reverse flattening Test
(6)Hydrostatic Test or Nondestructive Examination
 
 
Marking
Each tube having passed the inspection shall be marked with the following items. However, the order of arranging the items is not specified. Further, in the case of either smaller tubs or request from the purchaser, the tubes may be bundled together and marked for each bundle by a suitable means.
 
(1) Class symbol(STB 340)
(2) Letter symbol indication the manufacturing method
(3) Dimensions
(4) Manufacturer's name or its abbreviation
(5) Letter symbol Z indicating the designation of special quality requirements
Note  Symbols for indicating the manufacturing method shall be as follows. However, - may be replaced by a blank.
Hot finished seamless steel tube -S -H
Cold finished seamless steel tube -S -C
Electric resistance welded steel tube other than Hot finished and cold finished -E -G
Hot finished electric resistance welded steel tube -E -H
Cold finished electric resistance welded steel tube -E -C

Packaging & Shipping

Company Profile

 

Baowu Aluminum (Shandong) Co., Ltd. is located in Dongchangfu county, which is the largest aluminum manufacturing county in north China. The factory is only one kilometer from the Jiliao expressway, which make our transportation more convenient. Our total investment is more than one billion yuan for two large factories. The factory covers an area of 120, 000 Square Meters and The company employs more than 500 staff, including over 60 engineering technicians. Our annual output capacity is more than 120, 000 tons of aluminium profiles. Baowu has been awarded the honorary titles of "China Patent Shandong Star Enterprise", "Key Enterprise of Shandong Architectural Profile Industry", "Famous Brand of the Province Construction Machinery Industry", "Shandong Famous Brand", "Well-known Trade Mark of Shandong Province", "China Energy-saving Product Certification", etc. Our company was appraised as a national medium-sized enterprise by the Agricultural Ministry of China in 2004. As a professional aluminum profiles manufacturer, we specialized in manufacturing building door and window, decoration, curtain wall and industrial aluminum profiles. We have imported advanced manufacturing, checking and testing equipment of aluminum profiles from USA, Germany, Japan, Italy and Switzerland. With advanced checking and testing method and perfect quality guarantee system, our products are produced in strict accordance with the GB/5237 standard and have passed the qualification of ISO9001: 2000 International Quality Management System, ISO14001: 2004 Environmental Management System, 18000: 2001 Occupational Health Management System and 8000: 2001 Social Responsibility Management system. Meanwhile, we provides our customer with many kinds of finishes, such as sand blasting, polishing, brush, anodizing, electrophoresis, ceramic electrophoresis, sparkling electroporesis, powder coating, thermal insulation, fluorocarbon spraying (PVDF COATING), wood grain, etc. With stable product quality and perfect after-sales service, Baowu has been recognized as qualified supplier by lots of domestic famous enterprises such as Country Garden, Haier, Goertek, etc. Our aluminum profiles have been exported to many countries, such as USA, Brazil, Vietnam, India, South Korea, Australia, Germany, Kenya, Russia, Israel, Japan, etc.




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FAQ

 

Q:How do you control quality?
A:Mill test certification is supplied with shipment,third party inspection is avaliable.


Q:What are the advantages of your company?


A:We have many professionals,technical personnel,more competitive prices and best after-sales service than other stainless steel companies


Q:How many coutries you already exported?
A:Exported to more than 50 countries mainly from  Arab, Kuwait, Egypt, Turkey, Jordan, Brazil, India, Indonesia, Korea, etc


Q:Can you provide sample?

A:Small sample in store and can provide the sample for free.Customized samples will take about 5-7days
 

Q:Why should you buy from us not from other suppliers?
A:Diversified products, direct supply from manufacturer.

Q:What is your terms of payment ?
A:we accept T/T ,L/C ,D/A,D/P, Western union, paypal ,The payment method can be negotiated by both parties according to the actual situation.

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