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carbon steel square pipe tube
carbon steel pipe tubeare divided into seamless steel pipes and welded steel pipes.
seamless steel pipeis made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to the cross-sectional shape, the seamless steel pipe is divided into two types: round and special-shaped. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.
Product Video
Description
Welded steel pipe,also known as welded pipe, is a steel pipe made of steel plate or strip after crimping and welding, generally 6 meters. Welded steel pipe production process is simple, high production efficiency, variety specifications, less investment in equipment, but the general strength is lower than seamless steel pipe.Straight seam welded pipe, steel pipe made of hot or cold rolled steel plate or steel strip coil welding, straight seam welded pipe on welding equipment are called straight seam welded pipe.
① Seamless steel pipe
1.Grade:Q195/Q215/Q235/Q345/S235JR/GRB-D/STK500
2.Size: diemeter is from 21.5 in to406.4 mm,the thickness is from 0.6mmto 20mm the length is from m to 12m
3.Standard:SY/T5037-2000.GB/T9711.1-1997,GB/T9711.2API-5L，SY/T5040-92,ASTMA53A106，DIN1626,DIN1629,DIN2448JIS G3452JIS G3454JIS G3455JIS G3456JIS G3457JIS G3461
② welded pipe
1.Grade:Q195/Q215/Q235/Q345/S235JR/GRB-D/STK500
2.Size: diemeter is from 21.5 in to406.4 mm,the thickness is from 0.6mmto 20mm ,the length is from 1m to 12m
3.Standard:SY/T5037-2000.GB/T9711.1-1997，GB/T9711.2API-5L.SY/T5040-92 ASTMA53A106.DIN1626DIN1629DIN2448.JIS G3452JIS G3454JIS G3455JIS G3456JIS G3457JIS G3461
Product Parameter
| Product Name | square carbon steel pipe tube |
| Standard | ASTM A106, ASTM A53, API 5L Gr.B, DIN17175,DIN1629 |
| Steel Grade | API 5L: GR B, X42,X46,X56, X60,X65,X70EN:S275,S275JR,S3SSJRH,S355J2HGB:Q195,Q215,Q235,Q345,L175,L210,L245, L320,L360-L555 |
| Materials | 10#,208,45*,Q235,Q345,Q195,Q215,Q345C.Q345AASTM A53A/A53B/ A178C/A106B APISLST37,ST37-2,DIN 1629 ST35,ST45,DIN 17175 ST35.8,DIN 17175 19Mn516Mn,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9,P11,P12,P22,P91,P92.15CrMO,Cr5Mo.10CrMo910,12CrMo,13CrMo44,30CrMo,A333GR.1.GR.3,GR.6.GR.7Gr.B.X42,X46,X52,X60,X65,X70,X80,X100 |
| Technique | Hot rolled/cold rolled |
| Surface Treatment | Prime quality (bared, oiled,color paint,3UPE,or other anti-corrosive treatment) |
| Certification | CE,ISO,SGS,ETC |
| Packing | Waterproof paper,and steel strip packed.Standard Export Seaworthy Package.Suit forall kinds of transport,or as required |
| MOQ | 1 ton |
| Payments | T/T, L/C,Western union,Paypal, DP, etc |
| Application | Structure,Electric power transmission tower projects,Piling,Water,Oil & gas pipeline engineering,Mechanical industry, |
| Square Tube | Rectangle Tube | ||
| Size(mm) | Wall Thickness(mm) | Size(mm) | Wall Thickness(mm) |
| 20*20 | |||
| 25*25 30*30 | 1.2-3.0 | 20*40 30*40 | 1.2-3.0 |
| 40*40 50*50 | 1.2-4.75 | 30*50 25*50 30*60 40*60 | 1.2-4.75 |
| 70*70 75*75 80*80 90*90 100*100 | 1.5-5.75 | 60*80 50*80 100*40 120*80 | 1.5-5.75 |
| 120*120 140*140 150*150 | 2.5-10.0 | 160*80 100*150 140*80 100*180 200*100 | 2.5-10.0 |
| 160*160 180*180 200*200 | 3.5-12.0 | 200*150 250*150 | 3.5-12.0 |
| 250*250 300*300 350*350 | 4.5-15.75 | 250*200 300*200 350*200 350*250 450*250 400*300 500*200 | 4.5-15.75 |
| 280*280 400*400 | 5.0-20.0 | 400*350 400*250 500*250 500*300 400*600 | 5.0-20.0 |
Product Show
Black Square and Rectangular Annealing Steel Pipes
The square tube is a hollow square section light thin-walled steel tube. It is a section steel with a square cross-section shape and size made of Q235 hot-rolled or cold-rolled strip or coil as the base material, which is formed by cold bending and then welded by high-frequency welding. It has good comprehensive mechanical properties, weldability, cold and hot workability and corrosion resistance, and has good low temperature toughness.Square pipe and rectangular pipe is equal and unequal length of the steel pipe. Is made of steel after the process of rolling.
Generally the strip is unpacked, flattened, curled, welded to form a round tube, and then rolled into a square tube and then cut into the required length.
The square tube is divided according to the production process: hot rolled seamless square tube, cold drawn seamless square tube, extruded seamless square tube, welded square tube. Among them, the welded square tube is divided into:
(a) According to the process-arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnacewelding square tube
(b) According to the weld seam-straight seam welded square tube, spiral welded square tube
Product features
① Automatic equipment efficiency fast yearsof processing experience, master experi-ence, perfect equipment stable produc-tion.
② Selection of materials with a variety of specifications optional manufacturers supply,adequate supply, a variety of specifications optional, to meet your needs.
③ Years of industry experience quality assurance years of industry production experience, mature production process,product quality assurance.
④ To map to sample on-demand processing customization support product processing customization,according to customer needs for product processing customization.
| Chemical Properties % | |||||||||
| Grade A | |||||||||
| C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V |
| 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| Grade B | |||||||||
| C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V |
| 0.3 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| Grade C | |||||||||
| C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V |
| 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
Carbon steel manufacturing process:
The smelting of carbon steel is usually carried out in converter and open hearth. Converters generally smelt ordinary carbon steel, while open furnaces smelt all kinds of high-quality steel. The technology of oxygen top blow converter is developing rapidly and it can replace open hearth furnace. The refined liquid steel is injected into the ingot mold to obtain various ingot. After the ingot is forged or rolled, it is processed into plates, strips, bars, and sections of various sectional shapes. Carbon steel is usually used directly in the hot rolled state. When used for manufacturing tools and various machine parts, it needs to be heat treated according to the requirements of use; As for steel castings, most of them are heat-treated.
Application
Black annealed rectangular hollow tube are usually used in engineering construction, glass curtain wall, door and window decoration, steel structure, guardrail, machinery manufacturing, automatic manufacturing, home appliance manufacturing,shipbuilding, container manufacturing, electric power, agricultural construction, agricultural shed, bicycle frame, shelves,fitness equipment fields. The surface of the galvanized layer can effectively prevent rust.
Packing & Delivery
| Package | Standard export seaworthy package,suit for all kinds of transport, or as required. |
| Water-proof Paper + Edge protection + Wooden Pallets | |
| Bulk Size | Any size |
| Loading Port | Tianjin, Qingdao Port or any China Seaport |
| Container | 1*20ft container load Max. 25 Ton, Max. length 5.8m |
| 1*40ft container load Max. 25 Ton, Max. Length 11.8m | |
| Delivery Time | 7-15 days or according to the order's quantity |
Customer Feedback
FAQ
Q: Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time .Honesty is our company's tenet.
Q: Do you provide samples ? is it free or extra ?
A: The sample could can provide for customer with free,but the courier freight will be covered by customer account.
Q: Do you accept the third party inspection?
A: Yes absolutely we accept.
Q: How could you guarantee your products?
A: Each piece of products is manufactured by certified workshops, inspected byRUNHAIpiece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.
Q: How do we trust your company?
A: We specialise in steel business for years, headquarter locates in Jinan, Shandong province, you are welcome to investigate in any ways, by all means, you could place an order with trade assurance which could secure your payment.
Q: How can I get your quotation as soon as possible?
A: The email and fax will be checked within 24 hours,meanwhile,theFacebook,Skype,Wechat and WhatsApp will be online in 24 hours.Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out a best price soon.
