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Basic Info.
Model NO.
round steel pipe
Usage
Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Section Shape
Round
Thickness
4-30mm
Length
6m, 12m According to Client Requirement
Od-Square
10*10mm-1000*1000mm
Od-Rectangular
10*15mm-800*1100mm
Od-Round
10.3mm-609mm
Technology
ERW, LSAW, SSAW, Seamless
Delivery Time
7-30 Days
Materials
ASTM/AISI/SGCC/Chcc/Tdc51dzm/Tdc52dts350gd/Ts550gd
Grade
Gra/B/C, S235/275/355/420/460, Q195/235/345
Oiled or Non-Oiled
Non-Oiled
Alloy or Not
Non-Alloy
Processing Service
Welding, Punching, Cutting, Bending, Decoiling
Certification
CE, LEED, BV, Phd&EPD, Bc1, En10210, En10219
Invoicing
by Theoretical Weight
Tolerance
±5%, or Request, ±1%
Transport Package
Bundles
Trademark
Yuantai Derun
Origin
Tianjin, China
Production Capacity
10million/Year
Product Description
Our Adavantage:
√ Quick reply within 24 hours.
√ Large Stock for regular sizes.
√ Free sample high quality.
√ 100% after-sales quality and quantity assurance.
| ASTM A53/API 5L/ASTM A106/BS 1387:1985/EN10255 | ||||||
| Black/Galvanized Steel Tube | ||||||
| Tube | Inch | O.D.(inch) | O.D.(mm) | W.T.(inch) | W.T.(mm) | Pcs/Bundles |
| Light | 1/2' | 0.841 | 21.40 | 0.079 | 0.20 | 153 |
| 3/4' | 1.059 | 26.90 | 0.091 | 2.30 | 127 | |
| 1' | 1.328 | 33.80 | 0.102 | 2.60 | 91 | |
| 11/4' | 1.670 | 42.50 | 0.102 | 2.60 | 61 | |
| 11/2' | 1.903 | 48.40 | 0.114 | 2.90 | 61 | |
| 2' | 2.370 | 60.20 | 0.114 | 2.90 | 37 | |
| 21/2' | 2.991 | 76.60 | 0.126 | 3.20 | 37 | |
| 3' | 3.491 | 88.70 | 0.126 | 3.20 | 19 | |
| 4' | 4.481 | 113.90 | 0.142 | 3.60 | 19 | |
| Medium | 1/2' | 0.856 | 21.70 | 0.102 | 2.60 | 127 |
| 3/4' | 1.072 | 27.20 | 0.102 | 2.60 | 101 | |
| 1' | 1.348 | 34.20 | 0.126 | 3.20 | 61 | |
| 11/4' | 1.687 | 42.90 | 0.126 | 3.20 | 51 | |
| 11/2' | 1.919 | 48.80 | 0.126 | 3.60 | 44 | |
| 2' | 2.394 | 60.80 | 0.142 | 3.60 | 29 | |
| 21/2' | 3.014 | 76.60 | 0.142 | 4.00 | 24 | |
| 3' | 3.524 | 89.50 | 0.157 | 4.50 | 19 | |
| 4' | 4.524 | 114.90 | 0.177 | 4.50 | 14 | |
| 5' | 5.535 | 140.6 | 0.197 | 5.00 | 10 | |
| 6' | 6.539 | 116.1 | 0.197 | 5.00 | 7 |
| Heavy | 1/2' | 0.856 | 21.70 | 0.126 | 3.20 | 127 |
| 3/4' | 1.072 | 27.20 | 0.126 | 3.20 | 101 | |
| 1' | 1.346 | 34.20 | 0.157 | 4.00 | 61 | |
| 11/4' | 1.687 | 42.90 | 0.157 | 4.00 | 51 | |
| 11/2' | 1.919 | 48.80 | 0.157 | 4.00 | 44 | |
| 2' | 2.394 | 60.80 | 0.177 | 4.50 | 29 | |
| 21/2' | 3.014 | 76.60 | 0.177 | 4.50 | 24 | |
| 3' | 3.524 | 89.50 | 0.197 | 5.00 | 19 | |
| 4' | 4.524 | 114.90 | 0.212 | 5.40 | 14 | |
| 5' | 5.535 | 140.6 | 0.212 | 5.40 | 10 | |
| 6' | 6.539 | 166.1 | 0.212 | 5.40 | 7 |
| ASTM A 795 BLACK AND GALVANIZED WELDED AND SEAMLESS STEEL PIPE FOR FIRE PROTECTION USE | |||||
| Availiable Size For Sch10 Pipe(Light-Weight Pipe) | |||||
| Size | Thickness | Mass | Test Pressure | ||
| NPS | DN | OD(mm) | T.K(mm) | Kg/m | Mpa |
| 3/4 | 20 | 26.7 | 2.11 | 1.28 | 4.8 |
| 1 | 25 | 33.4 | 2.77 | 2.09 | 4.8 |
| 1-1/4 | 32 | 42.2 | 2.77 | 2.69 | 6.9 |
| 1-1/2 | 40 | 48.3 | 2.77 | 3.11 | 6.9 |
| 2 | 50 | 60.3 | 2.77 | 3.93 | 6.9 |
| 2-1/2 | 65 | 73.0 | 3.05 | 5.26 | 6.9 |
| 3 | 80 | 88.9 | 3.05 | 6.46 | 6.9 |
| 4 | 100 | 114.3 | 3.05 | 8.37 | 8.3 |
| 5 | 125 | 141.3 | 3.40 | 11.56 | 8.3 |
| 6 | 150 | 168.3 | 3.40 | 13.83 | 6.9 |
| 8 | 200 | 219.1 | 4.78 | 25.26 | 5.5 |
| 10 | 250 | 273.1 | 4.78 | 31.63 | 4.8 |
| Availiable Size For Sch40 Pipe(Standard-Weight Pipe) | |||||
| Size | Thickness | Mass | Test Pressure | ||
| NPS | DN | OD(mm) | T.K(mm) | Kg/m | MPa |
| 1/2 | 15 | 21.3 | 2.77 | 1.27 | 4.8 |
| 3/4 | 20 | 26.7 | 2.87 | 1.69 | 4.8 |
| 1 | 25 | 33.4 | 3.38 | 2.50 | 4.8 |
| 1-1/4 | 32 | 42.2 | 3.56 | 3.39 | 6.9 |
| 1-1/2 | 40 | 48.3 | 3.68 | 4.05 | 6.9 |
| 2 | 50 | 60.3 | 3.91 | 5.44 | 6.9 |
| 2-1/2 | 65 | 73.0 | 5.16 | 8.63 | 6.9 |
| 3 | 80 | 88.9 | 5.49 | 11.29 | 6.9 |
| ERW BLACK STEEL PIPE | ERW black steel pipe refers to the steel pipe produced by the high-frequency resistance welding process. The welding seam is formed by melting the base material of the steel strip itself, which has better mechanical strength than ordinary welded pipe. |
| ERW black steel pipes are widely used to transport vapor and liquid objects such as oil and natural gas and can meet various requirements of high and low pressure. | |
| ERW black steel pipe occupies a pivotal position in the field of transportation pipes in the world. | |
| ERW black steel pipe has the characteristics of high production efficiency, low cost, material saving, and easy automation, which make it widely used in various industrial sectors such as energy, electronics, automobiles, and light industry, and is an important welding process. |
The biggest difference between ERW steel pipe and seamless steel pipe is that ERW has a weld seam, which is also the key to the quality of ERW steel pipe. Modern ERW steel pipe production technology and equipment, due to the unremitting efforts of the world, especially the United States, have made the seamlessness of ERW steel pipes a relatively satisfactory solution. Some people divide the seamlessness of ERW steel pipes into geometric seamlessness and physical seamlessness. Geometric seamlessness is to remove the internal and external burrs of ERW steel pipes. Due to the continuous improvement and improvement of the structure of the internal burr removal system and the cutting tools, the removal of the internal burrs of large and medium-diameter steel pipes has been better handled. The internal burr can be controlled at about -0.2mm ~ O.5mm.
Physical seamlessness means that there is a difference between the metallographic structure inside the weld and the base metal, which leads to a decrease in the mechanical properties of the weld area, and measures need to be taken to make it uniform and consistent. The high-frequency welding heat process of ERW steel pipe causes the temperature distribution gradient near the edge of the tube blank, and forms characteristic areas such as melting zone, semi-melting zone, overheated structure, normalizing zone, incomplete normalizing zone, and tempering zone. Among them, due to the welding temperature above 1000°C in the superheated zone, the austenite grains grow rapidly, and a hard and brittle coarse-grained phase will be formed under cooling conditions. In addition, the existence of temperature gradients will generate welding stress. In this way, the mechanical properties of the weld area are lower than those of the base metal. The physical seamlessness is to heat the weld area to AC3 (927°C) with a medium-frequency induction heating device through the local conventional heat treatment process of the weld, and then carry out 60m Air cooling process with length and speed at 20m/min, and water cooling when necessary.
The use of this method achieves the purpose of eliminating stress, softening and refining the structure, and improving the comprehensive mechanical properties of the welding heat-affected zone. So far, advanced ERW units in the world have generally used this method to process welds, and good results have been obtained. The high-quality ERW steel pipe is not only unable to distinguish the weld seam, but also has a weld seam coefficient of 1, which realizes the matching of the weld seam area structure and the base material.
ERW steel pipe has the characteristics of using hot-rolled coil as raw material,and the uniform wall thickness can be controlled at about
±0.2mm.The two ends of the steel pipe are repaired and beveled according to the America API standard or GB/T9711.1 standard,and the
delivery is fixed to length,etc.advantage.In recent years,various natural gas pipeline network projects and gas companies have widely used
ERW steel pipes as the main steel pipes of urban pipeline networks.
| We can do | 1. All the pipes are high-frequency welded. |
| 2. Both inner and outer welded stabs can be removed. | |
| 3. Special design available according to requirements. | |
| 4. Pipe can be necked down and punched holes. | |
| 5. Supplying BV or SGS Inspection if the client needs it. |
Q1: How can I get a quotation from you ?
A1:You can leave us message, and we will reply every message in time. Or we may talk on line by We Chat / Whats app/Email.
Q2:Can I get samples before order ?
A2:Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings. But the customer will pay the freight.
Q3:What product information must I provide before making a purchase ?
A3:Please provide the grade,width,thickness,and surface treatment requirement,as well as the quantities you require.
Q4:What about product pricing information?
A4:Prices vary due to changes in raw materials on a regular basis.
Q5:Can I have a visit to your factory?
A5: Of course.Our factory located at No.1,Hengtong Road,Daqiuzhuang Industrial Zone,Tianjin,China.Customers that from all over the world are welcomed to our factory.
Q6:How long is your lead time?
A6:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15-30 days, depending on the quantity.
Q7:What are your payment terms?
A7:Payment<=1000USD, 100% in advance. Payment>=1000USD 30% T/T in advance ,balance before shippment.If you have another question, please feel free to contact us as below.