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black carbon erw steel pipe and steel tube

As the world's leading steel supplier, we can provide a wide range of steel types, including carbon steel, weathering steel, boiler steel, structural steel, etc., and we can meet customers' requirements in any size, as well as the production of steel and complete plant plans. If you are interested in these aspects, please contact us.

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    8 Things You Need To Know About Black Steel Pipes

    Black steel pipes are cast from several grades of ductile or malleable iron, whereas carbon steel pipes are generally welded or seamless. Black steel pipes are used for underground or submerged applications as well as for mainstream pipes and branches subjected to acids.A53 Seamless & Welded (ERW) Steel Pipe ASTM A53 Number of Tests Seamless and Electric Resistance Weld (ERW) bending, flattening, tensile on one length of pipe from each lot of 500 lengths, or less, of each pipe size. Permissible Variations for A53 steel pipe. Wall thickness The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

    ASTM A120 Pipe - A120 Seamless Pipe - A120 Welded & ERW black carbon erw steel pipe and steel tube

    Solitaire Overseas Is One Of The Leading Exporter & Supplier Of ASTM A120 Pipe & Tube In India & USA.Our Company Has A Huge Stock Welded & Seamless A120 Pipe.We Export Carbon Steel A120 Pipe, Hot Dipped Galvanized A120 Pipe, ASTM A120 Piping To Different Parts Of The World. We Regularly Export A120 Pipe & Tube To USA, UK, Singapore, Saudi Arabia, Kuwait, Canada, Jordan, ASTM A53 Grade B Carbon Steel Pipe Exporter, ASTM A53 black carbon erw steel pipe and steel tubeasme sa / astm a53 gr.b erw pipes and tubes supplier, asme sa / astm a53 gr.b carbon steel pipes and tubes manufacturer, heavy wall carbon seamless steel pipe astm a53 gr.b, a53 carbon steel pipe exporter, astm a53 gr.b in sch 40, schedule 160 steel pipe astm a53, erw steel pipe carbon steel material Stockholder, seamless and welded black and hot dipped galvanized steel pipe, a53/sa53 pipe black carbon erw steel pipe and steel tubeBlack Steel Pipe Schedule 40, Black Seamless & Welded black carbon erw steel pipe and steel tubeWe offer high-quality Black Steel Pipe Schedule 40, Black Steel Erw Pipe, Seamless Black Steel Pipe Sch 40, Sch 40 Black Steel Pipe at best price. Get Black Seamless Steel & Welded Steel Pipe

    Black Steel Pipe,ERW Black Steel tube-CHN Steel pipe black carbon erw steel pipe and steel tube

    We offer Black Steel Pipe, ERW Black Steel tube which is widely used in various Industries and also for domestic purposes. Black Carbon Steel tube is a very useful one in automobile Industries, structure etc. We also manufacture Galvanized Steel Pipe of very fine quality. We are among the leading black steel suppliers in China.Black steel pipe - TPMCSTEELBlack steel pipe Bare steel pipe and fittings will rust in 4 hours after production or shot blast, if no surface coating. Rust is permeable to air and water, therefore the interior steel beneath a rust layer continues to corrode.Carbon Square Steel Pipe ERW Steel Pipe Black Pipe/Tube black carbon erw steel pipe and steel tubeCarbon Steel Pipes, Steel Pipe Importer, Steel Tubes manufacturer / supplier in China, offering Carbon Square Steel Pipe ERW Steel Pipe Black Pipe/Tube Mild Steel Made in China, 6 8 EU Standard S355-J2 /J2s355jr/S355j0/ S355j2/Low Alloy Round Welded Steel Pipe, Ms Smls ASTM A106 Large Diameter Thick Wall Black Carbon Seamless Steel Pipe and so on.

    Carbon Steel ERW Pipes, CS ERW Pipes

    Carbon Steel ERW Pipes ASTM A53 Carbon Steel ERW Pipes, A106 CS Square Pipes, CS ERW Pipes Suppliers. As an acclaimed enterprise of the industry, Dhanlaxmi Steel is involved in offering a vast array of Carbon Steel ERW Pipes as a manufacturer, exporter, stockiest and supplier to Carbon Steel ERW Pipes, CS ERW PipesCarbon Steel ERW Pipes ASTM A53 Carbon Steel ERW Pipes, A106 CS Square Pipes, CS ERW Pipes Suppliers. As an acclaimed enterprise of the industry, Dhanlaxmi Steel is involved in offering a vast array of Carbon Steel ERW Pipes as a manufacturer, exporter, stockiest and supplier to Carbon Steel ERW Pipes, CS ERW PipingThese CS ERW Pipes is made by using premium quality components and advance technology under the guidance of professionals. Leveraging over services of our capable group of specialists, we are involved in providing a widespread array of our Carbon Steel Electric Resistance Welded Pipe, which can be further made obtainable by us in equally hot rolled / cold rolled structure finish choices.

    Carbon Steel Pipe & Tube manufacturerseamless Pipe black carbon erw steel pipe and steel tube

    Carbon Steel Pipes and Tubes Products A53 A106 API5L Grade B/C X42 Seamless Pipe Size Range 1/8" - 26" Schedules 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH Grades ASTM A53 Gr B, ASME SA53 Gr B, API-5L Gr B, ASTM A106 Gr B, ASME SA106 Gr B, ASTM A106 Gr C, PSL 1 and PSL2 API5L X-42 X-52 X-60 Seamless PipeCarbon Steel Pipe - Pipe & Tubing - FergusonCarbon Steel Pipe & Tubing. Carbon Steel Pipe. 76 results for "Carbon Steel Pipe" Page 1 of 4. Category Carbon Steel Pipe. Schedule/Class 40. End Connection 1 Plain End. black carbon erw steel pipe and steel tube 2 in. Black Plain End A53B Schedule 40 ERW DRL Pipe. Part # DBPPEA53BDRLK. To see availability for this product, personLog In or Get Online Access. $258.30. $6.15.Carbon Steel Pipe - an overview ScienceDirect TopicsCarbon steel pipe is used for liquid, gas, and steam services both above- and belowground services. It is not recommended for use in corrosive services but may be used in caustic services. 3.2.1.2 Grades of steel used. There are many grades or strengths of carbon steel pipe and they are available in a number of wall thicknesses. We have seen black carbon erw steel pipe and steel tube

    Carbon Steel Pipe Suppliers in India, CS Erw Pipe black carbon erw steel pipe and steel tube

    Carbon Steel Welded Pipe Suppliers can be used in water wells, because Carbon Steel ERW pipe is 2 times cheaper than Seamless Carbon Steel Pipe. We also supply & manufacture carbon steel galvanised pipe in various thickness and sizes. In our stock you can get 16" SCH 40 Carbon Steel Pipe, SCH 160 pipe, SCH 80 carbon steel pipe & SCH 10 pipe in black carbon erw steel pipe and steel tubeCarbon Steel Pipe Suppliers, Seamless/ERW Pipes Exporters black carbon erw steel pipe and steel tubeCarbon Steel Welded & Seamless Pipes, Heat Exchanger Pipes, Condenser Tubes. One of the Largest Carbon Steel Pipe Suppliers & Distributors in Egypt We are a professional manufacturer and just in time supplier for carbon steel pipes in Egypt. Our carbon steel pipe products are designed and manufactured in compliance with international standards and are appreciated for their sturdiness black carbon erw steel pipe and steel tubeCarbon Steel Pipe, CS Sch 40 Seamless and ERW Pipe supplierCarbon Steel Pipe Trace amounts of silicon, manganese and sulfur are allowed in this material but the carbon and iron are the primary components. Hi-tech Metal & Tubes is a manufacturer and supplier of various grades, sizes and shapes of Cs Pipes products.

    Carbon Steel Pipe, Low Carbon Steel Seamless/ Welded and black carbon erw steel pipe and steel tube

    Hot /cold drawn Carbon Steel Pipe manufacturer, Dia 6.0 - 3500mm, leading supplier of Sch 40 Seamless Carbon Steel Pipe in India, cheap and best quality Carbon Steel ERW Pipe, Jindal Low Temp CS Pipe.Carbon Steel Seamless Pipe - ERW Steel Tubes and At Steel Tubes India you can also find Carbon Steel Boiler Tubes, ASTM A53 pipe, A106 Pipe, API5L Grade B/C pipe, X42 Seamless Pipe (Type S), A53 Grade B & A ERW (Electric Resistance Welded) Pipe, A53F CW (continuous weld) (Type F), API5L X42 pipe in PSL 1 & PSL2, X52 pipe, X70 Seamless Pipe (Type S), API 5L X56, X60, API 5l X65 (Type E) & ASTM black carbon erw steel pipe and steel tubeCarbon Steel Seamless Pipe, CS Welded / ERW Pipe black carbon erw steel pipe and steel tubeCarbon Steel Welded Pipe, Carbon Seamless Pipe Carbon Steel Seamless Tube, Smls Pipe can be used in water wells, because the Carbon Steel ERW pipe is 2 times cheaper than Seamless Carbon Steel Pipe of reputed of Carbon Steel Seamless Pipe Manufacturer in India, Japan, Italy, USA, UK, Taiwan or China. If you are looking for tested & certified black carbon erw steel pipe and steel tube

    Carbon Steel Seamless and ERW Pipes and Tubes

    Carbon Steel Pipes Supplier, A53 Grade B Seamless Pipes, ASTM A106 Seamless Pipes, Carbon Steel Seamless Pipes & Tubes, ASTM A333 Gr.6 Low Temperature Steel Pipe & Tubes, Carbon Steel ERW Pipes & Tubes, ASTM A672 Grade C60/C65/C70 EFW Pipes & Tubes Manufacturer in India.Carbon/Mild Steel Pipe Dealers, Suppliers in Chandigarh black carbon erw steel pipe and steel tube100% Price Guarantee for Carbon and Mild Steel Seamless & ERW Pipes in Chandigarh Since we are one of the biggest manufacturer, importer and suppliers of carbon steel seamless pipes and mild steel welded pipes, we can offer you FOR site delivery to any location in Chandigarh at China 3mm Q235 Welded Black Carbon ERW Steel Pipe - Steel Pipe, Pipe, ERW Steel Pipe manufacturer / supplier in China, offering 3mm Q235 Welded Black Carbon ERW Steel Pipe, Wholesale Custom Soccer Football Wear Goalkeeper Wear, Sportswear Sublimation Mens Soccer Football Jerseys and so on.

    China Black Carbon ERW Round Steel Pipe/Tube - China black carbon erw steel pipe and steel tube

    China Black Carbon ERW Round Steel Pipe/Tube, Find details about China Tunnel Greenhouse, Steel Pipe from Black Carbon ERW Round Steel Pipe/Tube - Tianjin Yingtong Metal Products Co., Ltd.China Black Welded Steel Pipe, ERW/SSAW Black Steel Tube black carbon erw steel pipe and steel tubeERW Steel Pipe, Steel Tube, ASTM A53 manufacturer / supplier in China, offering Black Welded Steel Pipe, ERW/SSAW Black Steel Tube, Ms Carbon Steel Pipe, EN10219 S355J0 welded steel pipe ERW LSAW, ERW Steel Pipe Electric Resistance Welded pipe and so on.China ERW Carbon Black Steel Tube Steel Pipe - China Steel black carbon erw steel pipe and steel tubeSteel Pipe, Steel Tube, Black Steel Pipe manufacturer / supplier in China, offering ERW Carbon Black Steel Tube Steel Pipe, X42 X46 X52 X56 X60 API 5L Gr. B ERW Steel Pipe, Hot Sale Welded ERW Steel Pipe / Tube and so on.

    China ERW Steel Pipe, ERW Steel Pipe Manufacturers black carbon erw steel pipe and steel tube

    Buying or selling minerals has never been easier! If you are about to import ERW Steel Pipe, you can compare the ERW Steel Pipe and manufacturers with reasonable price listed above. More related options such as steel pipe, carbon steel pipe, steel tube could be your choices too.China Ms Hollow Section Steel Tube ERW Black Annealed black carbon erw steel pipe and steel tubeHollow Section, Steel Pipe, Steel Tube manufacturer / supplier in China, offering Ms Hollow Section Steel Tube ERW Black Annealed Steel Square Pipe, Made in China Factory ERW Cold Rolling Rectangular Steel Pipe, Cold Rolled ERW Annealed Round Steel Pipe and Cold Rolled Round Steel Tube for Furniture and so on.China black carbon erw steel tube wholesale - China Black Carbon Erw Steel Tube, China Black Carbon Erw Steel Tube Suppliers and Manufacturers Directory - Source a Large Selection of Black Carbon Erw Steel Tube Products at carbon steel ,stainless steel tube ,carbon fiber tube from China

    Cold Drawn Carbon Steel Tubes Seamless ASTM A106 / A53 black carbon erw steel pipe and steel tube

    Carbon Steel Pipe ASTM A106/ A53/ API 5L Gr.B Gr.A X56 X42 X46 X52 X60 X65 X70 SRL DRL . We produce the highest quality steel products. Customers use our seamless standard and line steel pipe for a variety of critical applications, including the transmission of crude oil, natural gas and petroleum products, refining and process piping for the chemical and petro-chemical industries, structural black carbon erw steel pipe and steel tubeComparison Between ERW and Seamless Steel PipeERW steel pipe is cold-worked and can be straightened online with a reduced diameter, and has an infinite multiple rule, so the straightness is better; seamless steel pipe is formed in a plastic state, plus the single rule (continuous rolling is 3~4 times rule) The straightness of the tube is difficult to control.Difference between Seamless & ERW Stainless Steel pipeERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge. It is mainly used for low/ medium pressure applications such as transportation of water / oil. Pearlites steel is one of the leading ERW Stainless Steel Pipes Manufacturer and exporter from India.

    EN10219 S275J2H ERW Carbon Steel Tube - HYSP Steel

    HYSP as the largest ERW steel pipe manufacturer in north China, we frequently produce EN10219 S275J2H ERW Carbon Steel Tube every month. Our S275J2H ERW Carbon Steel Tube are widely used in structure construction or building fields.. S275J2H ERW Carbon Steel Tube a structural grade steel with a minimum yield strength of 275 N/mm². Except the S275J2 steel grade, there are S275JOH steel black carbon erw steel pipe and steel tubeERW Black Steel Pipes - ERW Steel Pipes, ERW Steel Pipe black carbon erw steel pipe and steel tubeERW Black Steel Pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. These tubes & pipes are available in varying qualities, wall thickness, diameters and finishes depending on the requirement of the end-users.ERW Black Steel Pipes, Black Steel Tubes Supplier/Dealer black carbon erw steel pipe and steel tubeMetline Industries (Steel Pipes & Tube Division) is an ISO 9001:2008 Certified manufacturer and supplier of Black Steel Pipes/Tubes. We stock an extensive range of electric resistance welded (ERW) black steel pipes / tubes in a size range of 1/2 inch N.B. to 20 inch N.B. in the Light, Medium and Heavy classes, confirming to IS 1239 (Part-1) 2004, Equivalent to BS 1387.

    ERW Seamless Pipe - Tubes in Carbon, Alloy, Stainless Steel

    Repute is huge supplier & exporter of ERW, EFW Big Diamater Pipes and Tubing. Seamless sch 40 wall thickness NB, OD Tube as per ASTM / ASME 312 TP 304L, 316, 316L, 321, A53, A106 Gr. B, duplex 2205, Inconel 601ERW Standard Pipe Wheatland TubeThe following Wheatland Tube products manufactured in our Wheatland, PA mill conform to the requirement of NSF/ANSI 61 Carbon Steel Pipe, Black (Schedule 40 & Schedule 80), 24 Carbon Steel Pipe, Galvanized (Schedule 40 & Schedule 80), 4 Carbon Steel Water Well Casing, BlackERW Steel Pipe - China Steel Tube/Pipe manufacturer, Solar black carbon erw steel pipe and steel tubeChina ERW Steel Pipe catalog of ASTM A36 Equivalent Q235 ERW Round Carbon Steel Pipe, JIS G3101 Ss400 Steel Tube Price, ERW Welded Carbon Steel Tube with En 10219 ASTM A500 provided by China manufacturer - TIANJIN SHENGTENG INTERNATIONAL TRADING CO., LTD., page2.

    ERW Steel Pipe - China Steel Tube/Pipe manufacturer, Solar black carbon erw steel pipe and steel tube

    China ERW Steel Pipe catalog of Great Quality Special Shaped ERW Steel Pipe/Tube for Sale, ISO65- Carbon Steel Tubes Suitable for Screwing in Accordance with ISO 7/1 provided by China manufacturer - TIANJIN SHENGTENG INTERNATIONAL TRADING CO., LTD., page1.ERW Steel Pipe Price - Stainless Steel Pipe Steel Pipe black carbon erw steel pipe and steel tubeIn Stock ERW Pipe Price January 03 - January 03 , 2019. Date 2019-01-03 View(s) 1180 Tag erw pipe price, erw steel pipe price, in stock erw pipe price, erw carbon steel pipe price Updated price list for erw pipe, erw steel pipe, in stock erw pipe, erw carbon steel pipe black carbon erw steel pipe and steel tube.ERW steel pipeBestar steel is a dedicated carbon steel pipe provider and exporter for welded and seamless steel pipes covering well casing, tubing, OCTG pipe, ERW steel pipe, LSAW steel pipe, SSAW steel pipe etc.

    ERW-BLACK-STEEL-PIPES-TUBES

    ERW Black & Galvanized Steel Tubes as per IS:1239 (Part-1) 1990 Equivalent to B.S:1387-1987/ASTM SH-40/ASTMA-Click to Download ERW Steel Pipes for Water Gas & Sewage as per IS-3589 / 1991Electric Resistance Weld Black Carbon Steel Pipe black carbon erw steel pipe and steel tubeCarbon and Stainless-Steel Pipe and Tube Copper Tube and Brass Pipe Cast Iron Soil Pipe PVC and Plastic Pipe Aquatherm Polypropylene Pipe Aluminum Pipe and Tubing and Pex Tubing Pipe Insulation and Pipe Protection Schott Glass Acid Waste Pipe; black carbon erw steel pipe and steel tube 8 In, STD Wall ERW Black Pipe, Carbon Steel, Roll Groove Both Ends, A53B Mfr # CP065499; Item black carbon erw steel pipe and steel tubeErw Black Carbon Mild Steel Erw Pipes And Tubes - Buy Erw black carbon erw steel pipe and steel tubeErw Black Carbon Mild Steel Erw Pipes And Tubes , Find Complete Details about Erw Black Carbon Mild Steel Erw Pipes And Tubes,Erw Black Pipes And Tubes,Mild Steel Erw Pipes,Carbon Steel Erw Pipes from Supplier or Manufacturer-Tianjin Bridge Steel Co., Ltd.

    Garg Tube Limited, Delhi - Manufacturer of ERW Black Steel black carbon erw steel pipe and steel tube

    ERW Black Steel Pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. These tubes & pipes are available in varying qualities, wall thickness, diameters and finishes depending on the requirement of the end-users.IS 1239 Pipe, IS 1239 Tube, IS 1239 YST 210 black carbon erw steel pipe and steel tube - Marc SteelIS:1239 part 1 mild steel tube pipe dealer, IS 1239 black erw pipe and tube, black erw pipes as per is3589 gr. 330 & gr. 410, pipes as per IS 1239 part 1 manufacturer, IS 1239 structural pipes distributor, IS 1239 yst 210 / 240 / 310 / 355 seamless pipes, carbon steel IS 1239 seamless pipes, black & galvanized supplier, IS 1239 is 1239 equivalent pipes to ASTM /ASME /BS / EN StandardIS 1239 Pipe, IS 1239 Tube, IS 1239 YST 210 black carbon erw steel pipe and steel tube - Marc SteelIS:1239 part 1 mild steel tube pipe dealer, IS 1239 black erw pipe and tube, black erw pipes as per is3589 gr. 330 & gr. 410, pipes as per IS 1239 part 1 manufacturer, IS 1239 structural pipes distributor, IS 1239 yst 210 / 240 / 310 / 355 seamless pipes, carbon steel IS 1239 seamless pipes, black & galvanized supplier, IS 1239 is 1239 equivalent pipes to ASTM /ASME /BS / EN Standard

    IS 1239 Steel Pipe, IS 1239 YST 210/240/310 Carbon Steel black carbon erw steel pipe and steel tube

    IS 1239 Black ERW Pipe manufacturer in India, IS 1239 Square Tube suppliers in Dubai, UAE. Neelcon Steel is Looking for more Stockholders in Middle East, Europe, Africa, Far East Asia to sell our Carbon Steel IS 1239 Yst 355 Pipe.Buy Carbon Steel IS 1239 YST 210 / 240 / 310/ 355 Pipe & Tubes at reasonable price, we are one of the worlds leading IS 1239 Yst 240 Condenser & Air Heater Tubes black carbon erw steel pipe and steel tubeIS:1239 Steel Pipes, ERW Steel Tubes Supplier Mumbai, IndiaWe stock an extensive range of electric resistance welded (ERW) IS:1239 steel pipes / tubes in a size range of 1/2 inch N.B. to 6 inch N.B. in the Light, Medium and Heavy classes. METLINE also offers black steel pipes in compliance with IS 3589-2001 and IS 10577-1982.Large diameter ERW steel pipe, heavy wall ERW steel pipe black carbon erw steel pipe and steel tubeMassive diameter ERW steel pipe, heavy wall ERW steel pipe and tubes API 5L ERW steel pipe OD 8inch-36inch ERW Pipe As manufacturing facilities for ERW pipes and tubes, QCCO(qiancheng steel pipe ,ltd) Steel has a 4 ERW lines at Yanshan Operates along with a a single ERW line at East Japan Performs (Cangzhou City).

    Low Carbon Mild Steel Black Seamless Pipes Tubes

    Product Show. Carbon seamless steel pipe is a kind of strip steel. Steel pipe with hollow cross-section, a large number of pipes used to transport fluid, such as the transportation of oil, natural gas, gas, water and some solid materials such as pipes.Pipe Schedule 40 A53 B ERW Steel - HYSP Steel Pipe SupplierHYSP manufacture Pipe Schedule 40 A53 Steel Pipe & Tube as per Type EElectric-resistance-welded, Grades A and B. Application of A53 Carbon Pipe Schedule 40. A53 Mild Steel Pipe schduele 40 ordered under this specification is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and black carbon erw steel pipe and steel tubePrice List of Carbon Steel Pipes & Tubes, Seamless Pipe black carbon erw steel pipe and steel tubePrice of Carbon Steel Welded Pipe. Price of API 5L Gr.B ERW/Welded Pipe $ 1700 ~ $ 2200 USD/Ton. Price of API 5L Gr.X42 ERW/Welded Pipe $ 4300 ~ $ 4800 USD/Ton. Price of API 5L Gr.X46 ERW/Welded Pipe $ 4300 ~ $ 4800 USD/Ton. Price of API 5L Gr.X52 ERW/Welded Pipe

    Seamless steel pipe, ERW steel pipe, SSAW steel pipe black carbon erw steel pipe and steel tube

    Bestar steel is a dedicated carbon steel pipe provider and exporter for welded and seamless steel pipes covering well casing, tubing, OCTG pipe, ERW steel pipe, LSAW steel pipe, SSAW steel pipe etc.Steel Pipe, OCTG, Casing and Tubing Supplier - OctalOctal offers welded (ERW, LSAW, SSAW) and seamless steel pipe for sale, available in Black Carbon Steel Pipe for sale. ASTM A53 B, A106 B, A179, A192, A333 Gr 1 to Gr 6. API 5L Pipe. API 5L pipe Gr B, X42, X46, X52, X56, X60, X65, X70, PSL1 and PSL2 for Sale in Welded Carbon Steel Pipe, CS Pipe ManufacturerPipe Type ERW Pipe, ERW Steel Pipe, Electric Resistance Welded Pipe Application F or Low Pressure Fluid Transmission, M achinery Manufacturing Specification OD 21 black carbon erw steel pipe and steel tube

    black carbon erw steel pipe-Quai 19 Production STEEL

    For the purpose of oil country tubular, water and gas conveyance ERW steel pipes are widely used. China ERW Welded Black Schedule 40 Carbon Steel Pipe ERW Welded Black Schedule 40 Carbon Steel Pipe ERW steel pipes are made of hot rolled coils. It adopts cold bending forming, and the sizing is completed by 0.6% reduction.erw pipe 38x38 square black steel tube - Carbon steels black carbon erw steel pipe and steel tubeWe specializes in erw pipe 38x38 square black steel tube. erw welded hot rolled black carbon square rectangular erw welded hot rolled black carbon square rectangular hollow section steel pipe tube. Square hollow sections or square tubes are cold formed and welded from either hot rolled, cold rolled, pregalvanized or stainless steel..