Steel pipe for carbon seamless ,St45, cnbm

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Quick Details

Thickness:  6 - 50 mm Section

Shape:  Round,r

Outer Diameter:  33 - 600 mm

Secondary Or Not:  Non-secondary

Application:  Fluid Pipe

Technique:  Hot Rolled,Hot Rolled,Cold Drawn,Hot Expanded Certification:  API Surface Treatment:  Beveled end or plain end or varnished as per buyer

Special Pipe:  API Pipe Alloy Or Not:  Non-alloy

Brand Name:  XPY(Xinpengyuan)

Length:  6-12m or according to clients' requirements

Standard:  BS 3059-2,JIS G3454-2007,GB 5310-1995,GB 3087-1999,GB/T 8163-1999,GB/T 8162-1999,GB 6479-2000,DIN 1629/3,DIN 2448,ASTM A106-2006,ASTM A53-2007,API 5CT,API 5L,BS,JIS,GB,DIN,ASTM,API

Certification & Standard



Cold Rolled


0.14mm ~ 1.5mm


10mm ~ 1240mm


As customers' requirements

Surface finish

NO.2B/ NO.3/ NO.4/ HL/ 8K/ BA 

Chemical Composition (MT)%

(C) :≤0.12% (Si) :≤0.75% (Mn) :≤1.00% (P) :≤0.040% (S) :≤0.030%

(Ni) :≤0.60%(Available to contain) (Cr) :16.00~18.00%


Good flexibility, Resistant to corrosion, Thermal Conductivity and lower thermal expansion.


l Be uesd in manufacturing kitchen ware field.

l Auto exhaust parts, Heat exchanger, Washing machinery.

l Interior/ Exterior decoration for building

l Household Appliances or Appliance components.


Southeast Aisa, Mid East, Africa, Estern Aisa, Western Europe ,etc.


Bundle package, Wooden case, Container or bulk, etc in export standard ;or as customers'requests

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Q:Are the welded and galvanized tubes the same weight?
The same specifications of welded pipe and galvanized pipe weight is not the same, the general welding tube weight, galvanized pipe light.
Q:What are the specific differences between flexible pipes and rigid pipes?
Watch from outside:The rigid waterproof sleeve is made up of steel bushing and wing ring, and the structure is simple;The flexible waterproof sleeve mainly consists of flange sleeve, sealing ring, flange, pressure plate, wing ring, bolt and nut. The structure is complicated.
Q:ASME seamless tube how to express, what is the form, I did not find on the ASME, thank God!
Seamless steel pipe, welded steel pipe, then its means of expression is: nominal diameter refers to the outer diameter (diameter * wall thickness), the unit is mm. [for example, seamless steel tubes of phi 32 * 3. It means that the nominal diameter (outside diameter) is seamless steel pipe of phi 32mm and wall thickness 3mm.
Q:Heating system DN40 and DN32 welded steel pipe how to connect?
As for the flange connection: low pressure pipeline is generally not used in this way, can be divided into threaded flanges and flange welding flange, and the flange connecting pipes of different diameters, only the welded flange to diameter, said in a low pressure pipeline which has low pressure pipe connection make an unnecessary move, this is not much, but there are also people with non the standard flange for connecting different pipe diameter, which is not consistent with the technical specification!
Q:Where is a steel pipe casing usually used?
The casing, usually used in the basement construction, to protect the pipeline or convenient pipeline installation hoops.
Q:What is the diameter of the steel tube DN20?
The symbol is DN, the unit is mm, but omitted to write. Also available in English in.
Q:Which is cheaper, angle iron or steel pipe?
Steel tube (Steel pipe) production technology development began in the bicycle manufacturing industry, the rise of the early nineteenth Century during the oil development, the two world war ships, boilers, aircraft manufacturing, manufacturing of power boiler after the Second World War, the development of chemical industry of petroleum and natural gas drilling and transportation, will effectively promote the the yield and quality of varieties, the development of steel tube industry.Steel pipe is not only used to transport fluid and powder solid, exchange heat energy, and manufacture mechanical parts and containers, but also is an economic steel. It can reduce weight and save 20 to 40% of metal by using steel pipe to make building structure, network frame, prop and mechanical support. Moreover, it can realize factory mechanization construction. Using steel pipe to manufacture road bridge can not only save steel, simplify construction, but also greatly reduce the area of coating protective layer, save investment and maintenance cost.
Q:What connections are there for concrete filled steel tubular column foundations?
Application of double beam connection node usually uses "I" shape columns and steel bracket which is around the construction technology of a modern steel concrete column girder casting formed in the steel pipe outside through the two structures, the bearing pin four axis and four angles on the common components of stress transfer. The construction technology in the application is usually used at both ends of the stress transfer construction mode, through the four steel bracket to the corresponding shear stress, avoid crack width because the node contact produces clear, delayed cracks, improve anti cracking ability of regional nodes.This node model in the connection when the longitudinal reinforcement without through the tube, without bending the construction can be carried out directly, with easy construction technology, construction control difficulty, the economic benefits of construction at the same time, the advantage of low reinforcement to save. In this joint engineering technology, the key pride is to control the stress transfer of steel bracket.
Q:Is hot dipped plastic pipe steel?
Hot dip plastic composite pipes used in coal mine gas drainage, ventilation system, fire water system, central air conditioning HVAC piping circulating water, industrial water supply and drainage, water supply and drainage life, conveying gas and other gases, power threading, chemical pipelines and water disposal pipe etc..
Q:Steel pipe is particularly long, how to clean the inner wall of the pipe so that it can be thoroughly cleaned
If the pipe is relatively long, you have water, you can buy ultrasonic vibration plate into the water for ultrasonic cleaning, if not too long with an ultrasonic vibration rod, inserted into the pipe cleaning, and then rinse with water by ultrasonic stripping of dirt, give you recommend a factory in Jining Hengda

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