The Difference between the Elbow and the Elbow Pipe

The elbow and the elbow pipe basic difference is the elbow shorter. R=1 or 2 times is the elbow, then big multiples is the elbow pipe. The cold bend pipe can be bend by straight pipe,

finished with one procedure, not need to do secondary corrosion in the production.  However, the production process of the elbow is much complicated compare to the elbow pipe.  It is manufacturers custom-made, corrosion, which means it has long order cycle. The cost efficient of the elbow higher than the elbow pipe and the price is much higher too. It is know to people that the elbow pipe easily damaged due to no corrosion prevention. because inexpensive so that it is widely used in the project that not have high demands. 

Construction technology of the cold bend pipe has a oil standard, West-East natural gas transmission project have its enterprise standard. Both are good at plain area, considering the cost, the elbow pipe is better. But the elbow is must at narrow sector , like stonework trench segment . The curvature semidiameter of the elbow are small , usually 6D, and the the elbow pipe is 40D.

DIN ERW steel pipes

DIN ERW Steel Pipes Specification

Product Type: ASTM A53 GR.B steel pipe

Product Name: DIN 8 inch XS ERW ASTM A53 GR.B steel pipe

DIN 8 inch XS ERW ASTM A53 GR.B steel pipe

size: 8 inch, DN200,219.1mm ERW ASTM A53 GR.B steel pipe

Material: ASTM A53,20#,Q235,STPY41,STPG38,STB30,STB33,STB35,STPT42 etc

Wall Thickness: XS,12.70mm

Certificate: ISO 9001,SGS,BV etc.

Capacity: 2000tons/month

DIN 8 inch XS ERW ASTM A53 GR.B steel pipe

Welding process: Electric arc welding tube, High frequency electric resistance welded carbon steel pipe

Length Fixed: 3.0,5.8,5.85,5.9,6.0,11.8,12.0m.

Random length: 5-12m

DIN 8 inch XS ERW ASTM A53 GR.B steel pipe

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

What is Seam Pipe

Seam pipe refers to the strip or plate bending round, square and other shapes and then welded into the surface jointed pipe. Slotted pipe with blank steel plates or steel strip.

With the development of high-quality steel rolling production as well as the rapid development of welding and inspection techniques, and improved quality of welds,

pipe has increasing varieties and specifications, and take the place of seamless steel pipe in some areas. Compare to seamless steel pipe, seam pipe have some advantages, less cost, high production and efficiency.

According to different welding methods, can be divided arc welded pipe, high-frequency or low frequency electric resistance welded pipe, gas pipe, stove pipe, Bundy tubes.

According to seam shape, can be divided into longitudinal and spiral welded pipe.

According to the end-use, can be divided in to general welded pipe, galvanized pipe, oxygen blowing pipe, wire casing, metric pipe, roller tube, deep well pump tube, automotive tube, transformer tube, welding thin-walled tube, welding shaped tube and spiral welded pipe.

According to the end of the shape,  can be divided into circular pipe and shaped (square, flat, etc.) pipe.

We are manufacturer of Seam Steel Pipes and supply high quality Seam Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Five Different Heat Treatment Technique

Heat treatment is the process of heating and cooling metals to achieve desired physical and mechanical properties through modification of their crystalline structure. The temperature, length of time, and rate of cooling after heat treatment will all impact properties dramatically. The most common reasons to heat treat include increasing strenght or hardness, increasing toughness, improving ductility and maximizing corrosion resistance.

1. Annealing

Annealing is a rather generalized term. Annealing consists of heating a metal to a specific temperature and then cooling at a rate that will produce a refined microstructure. The rate of colling is generally slow. Annealing is most often used to soften a metal for cold working, to improve machinability, or to enhance properties like electrical conductivity.

2. Normalizing

Normalizing is a technique used to provide uniformity in grain size and composition throughout an alloy. The term is often used for ferrous alloys that have been austenitized and then cooled in open air. Normalizing not only produces pearlite, but also bainited sometimes martensite, which gives harder and stronger steel , but with less ductility for the same composition than full annealing. 

3. Stress relieving

Stress relieving is a technique to remove or reduce the internal stresses created in a metal. These stresses may be caused in a number of ways, ranging from cold working to non-uniform cooling. Stress relieving is usually accomplished by heating a metal below the lower critical temperature and then cooling uniformly. 

4.Quenching

Quenching is a process of cooling a metal at a rapid rate. This is most often done to produce a martensite transformation. In ferrous alloys, this will often produce a harder metal, while non-ferrous alloys will usually become softer than normal. 

5. Tempering

Untempered martensitic steel, while very hard, is too brittle to be useful for most applications. A method for alleviation this problem is called tempering. Most applications require that quenched part be tempered. Tempering consists of heating steel below the lower critical temperature,  (often from 400 to 1105° F or 205 to 595°C, depending on the desired results), to impart some toughness. Higher tempering temperatures are sometimes used to impart further ductility, although some yield strength is lost. 

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

US DOC Sets Dumping Duties on Some Steel Pipe Imports

US Department of Commerce announced on Friday its final ruling on anti-dumping duties on imports of steel pipes and tubes from South Korea, Mexico and Turkey, setting levies. The decision covers imports of heavy-walled rectangular welded carbon steel pipes and tubes which are used in construction and transportation.

The Characteristics of Stamping Elbow

Stamping elbow is used in water supply pipe, water vapor pipeline, gas pipeline, oil pipeline connection. Stamping elbow color is black, right angle camber, excellent quality, wear resistance, not easy to damage. Stamping elbow standard is 1/2-10 inch, the products are widely used in petroleum, chemical, metallurgy, electric power and other professional pipeline equipment, equipment, matching and other effects.

Here is the characteristics of stamping elbow

First, the environmental protection: PE-RT can be used to recover, do not pollute the environment. PEX can not be recovered will be secondary pollution; stamping elbow pipe development trend: stamping elbow material not only has qualified the creep rupture curve and the pipe price moderate, construction relative to other types of convenience, convenient, connection methods are attributed to the standard at this stage is the most reliable inter penetration of hot melt connection method, pipe parts of aperture is greater than the inner diameter of the same pipe standard, in the system because there is no necking part of the mechanical connection methods, so system fluid resistance is relatively small.

Two, a long time pressure function, only from the description of stress, the standard stamping elbow pressure function is the best. However, due to various factors, the floor heating pipe practice wall thickness is generally 2mm. And in this wall thickness of all kinds of pipe can be satisfied with the demand for floor heating, stamping elbow pipe pressure superiority performance does not come out;

Three, low temperature heat shock resistance: PE--RT and PEX resistance to low temperature impact function better. Winter construction is susceptible to the impact of pipe rupture, increase the flexibility of the organization construction.

Four, stamping elbow pressure function is the best. But due to various factors, floor heating pipe of the actual wall thickness of and in the thickness of the various types of pipes can be satisfied with floor heating demand, GB punching elbow pipe pressure advantage does not come out; thermal conductivity: for floor heating demand for pipe has good thermal conductivity.

API 5L ERW Pipes

API 5L ERW Pipes Specification

Product Type: API 5L

Product Name: API 5L gr.b erw carbon steel round pipe

API 5L gr.b erw carbon steel round pipe

Sizes (ERW): 1/2″ – 48″

High Yield ERW/SAW Carbon Steel Pipe: API 5L Gr.B X42/X46/X52/X56/X60/X65/X70/X80 PSL-1

API 5L gr.b erw carbon steel round pipe

Type: Electric Resistance Welded (ERW) carbon steel round pipe

Size: NPS 1/2 TO NPS 48 (DN15 to DN 1200), with nominal（average）wall thickness as given in ASME B 36.10M or as customer’s requirement

Outer Diameter (in mm): from 21.3mm to 1219.2mm

Thickness: from 4mm to 12mm

Standard: ANS/API 5L PSL1

Length: Min 3 Meters, Max12 Meters, or according to customer’s requirement

Surface: Black painting, varnish paint, anti rust oil, hot galvanized or cold

We are manufacturer of API 5L ERW pipes and supply high quality API 5L ERW pipes in both large and small quantities worldwide & offer you the best prices in the market.

For more information, please contact us.