Nature gas longitudinal seam steel line pipe

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Product Description:

Specification

Size

OD 19mm-710mm 1/2"--28" inch

Thickness

2.5-50mm

Executive standards

GB/TB163-2008, GB/T3087-2008, API 5L, API 5CT, ASTM A106,

ASTM A53, BS1387-1958

Steel grade

10#, 20#, 20G, 35#, 45#, 16Mn(Q3458), 27SiMn, DZ50,12Cr1MoV, A106, ST52, ST45, Gr8.

Finish

Galvanization ,bared, oiled, black paint or as per the client's requirement,beveled edges, anti-rust oil and caps on both ends, 3PE,FBE

Delivery time

10-30 days after receiving the deposit, some size is available

Payment item

30% advance payment, the balance will be against the BL copy

LC irrevocable at sight,

Marketing

South East Asia, Africa, European, South AMERICAN, USA, Australia,middle east etc.

Application

Structural pipe, oil or gas transportation pipe, fluid pipe, line pipe, drill pipe, boiler pipe, etc

Packing

PP, PE, BUNDLE, CAPS ON BOTH ENDS, AS PER THE CLIENT'S REQUIREMENT

Certificate

API, ISO9001

Standard

BS, JIS, GB, DIN, ASTM, API

Port

Xingang port Tianjin China

Dimension for thread seamless steel pipe

Chinese Standard

American Standard

German Standard

10#

A53-A

St37

DIN1626

A106-A

St37-2

DIN17175

A179-C

St35-8

DIN17175

20#

ASTM A106-B

St45-8

DIN17175

ASTM A53-B

St42-2

DIN1626

ASTM 178-C

St45-4

DIN1629/4

45#

ASTM A 1045

CK45

16Mn

A210-C

St52

DIN1629/3

St52.4

DIN1629/4

37Mn5

J55


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Q:Are the welded and galvanized tubes the same weight?
There should be no difference in the weight of the same specifications for the welded pipe and galvanized pipe. The slight difference is that the galvanized pipe should be pickled before galvanizing and must digest some iron and then galvanized. The difference depends on the difference in the process. So the theoretical calculations are the same.
Q:What's the difference between a rectangular tube and a rectangular steel tube?
The classification of rectangular tube: steel pipe seamless steel pipe and welded steel pipe (tube) hot-rolled seamless tube, seamless tube, seamless tube, welded tube extrusion. The welded square pipe is divided into two parts:(a) according to the process of arc welding - resistance welding tube, square tube (high frequency and low frequency), welding square tube, welding square tube furnace (b) according to the weld - welded square tube, spiral welded pipe.
Q:What is DN50 for welded pipe?
Refers to the use of welded steel pipe made of DN50 steel pipe, refers to the inside diameter is 50mm, the market of common DN50 pipe also refers to the 2 inch pipe, standard pipe: 3.5mm thickness, pipe diameter 60mm, the weight of 4.88kg/m theory. DN50 seamless steel pipe, commonly used in the market, has two specifications: 57mm, 60mm, and if no special instructions, 57mm is commonly used. The outer diameter of the welded pipe is only 60mm this specification.
Q:How to descaling galvanized steel pipe?
If the substrate is rusty, rust removal can be removed by acid leaching. If the coating is rusted, it can also be dipped in acid, but this will also remove the coating and make the base material more susceptible to rust, preferably by re plating and passivation
Q:How to calculate the maximum bending stress of steel pipe? Is there a list of the maximum flexural normal stresses for steel pipes of different materials and diameters?
Strength design of steel pipe by this formula to calculate the maximum normal stress in the steel pipe should be less than the value (based on your choice of different grades of steel, steel strength design value is not the same, this value can also be found through the design manual of steel structure), meet the requirements, it can meet the requirements of steel pipe under the action of bending moment strength.
Q:Where is the difference between seamless steel pipe and welded pipe?
The steel tube is a hollow steel strip, used as pipe conveying fluid, such as oil, gas, water, gas, steam, in addition, the bending and torsional strength of the same, the weight is light, so it is widely used in the manufacture of machinery parts and engineering structures. It is also used to produce all kinds of conventional weapons, guns, shells and so on.Pipe classification: steel pipe seamless steel pipe and welded steel pipe (tube) two categories. It can be divided into round tube and special-shaped tube according to the sectional shape. The round steel tube is widely used, but there are some special-shaped steel tubes such as square, rectangle, semicircle, hexagon, equilateral triangle and octagon.
Q:Why can't stainless steel be put together with carbon steel tube?
Stainless steel can not be put together with carbon steel because of galvanic corrosion
Q:Is the diameter of the steel tube indicated by the outer diameter by the wall thickness or by the inside diameter by the wall thickness?
1, DN refers to the nominal diameter of the pipe, the outer diameter and diameter of the average. The value of DN, the value of =De, the thickness of -0.5* tube wall. Note: This is neither outer diameter nor inner diameter. Water and gas transmission pipe (galvanized steel pipe or non galvanized steel pipe), cast iron pipe, steel plastic composite pipe and polyvinyl chloride (PVC) pipe, etc., shall be marked with nominal diameter "DN" (such as DN15, DN50).2, De mainly refers to the pipe diameter, PPR, PE, PP pipe diameter, generally use the De label, are marked as outer diameter and thickness of the form, De25 * 3.3 and D generally refer to the inner diameter of the pipe.4, d concrete pipe diameter. Reinforced concrete (or concrete) pipe, clay pipe, acid resistant ceramic tube, pipe and other pipe diameter gangwa, should be said with inner diameter of D (such as D230, D380 etc.)5, Phi represents the diameter of the ordinary circle. It can also indicate the outer diameter of the pipe, but it should be multiplied by the wall thickness at this time. Such as: Phi 25 x 3, indicating outer diameter 25mm, wall thickness of 3mm pipe.
Q:Can stainless steel pipes spray black paint?
Yes, after painting, I usually touch hands and paint off in 2 years or so
Q:What is the outer diameter and wall thickness of DN40 steel pipe?
DN40, refers to the diameter of 40mm, that is, an inch and a half, there are welded pipe and galvanized pipe,Ordinary wall thickness 3.5mm wt 3.84kg/mThicken 4.25mm weight 4.58kg/m

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