Common steel pipe introduction - seamless steel pipe

- Feb 01, 2021-

It is a long strip of steel with a hollow section and no seams around it. Steel pipes have a hollow section and are used in large quantities as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when it has the same bending and torsional strength. It is an economical section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycles. Shelf and steel scaffolding used in construction. The use of steel pipes to manufacture ring-shaped parts can improve material utilization, simplify manufacturing processes, save materials and processing man-hours, such as rolling bearing rings, jack sleeves, etc., and have been widely used in steel pipes. Steel pipes are also indispensable materials for various conventional weapons, and barrels, barrels, etc. are all made of steel pipes. Steel pipes can be divided into round pipes and shaped pipes according to the shape of the cross-sectional area. Since the area of the circle is the largest under the condition of equal circumference, more fluid can be transported by the circular tube. In addition, the circular section is subjected to a relatively uniform force when subjected to internal or external radial pressure, and therefore, most of the steel pipes are round pipes. 

  However, the round pipe also has certain limitations. For example, under the condition of being bent by the plane, the round pipe is not as strong as the square and rectangular pipe, and some agricultural machinery skeletons, steel wood furniture, etc. are commonly used square and rectangular pipes. Shaped steel pipes of other cross-section shapes are also required depending on the application. 

  1. Structural seamless steel pipe (GB/T8162-1999) is a seamless steel pipe used for general structural and mechanical structures. 
  2. Seamless steel pipe for fluid transportation (GB/T8163-1999) is a general seamless steel pipe for conveying fluids such as water, oil and gas. 
  3. Seamless steel pipe for low and medium pressure boilers (GB3087-1999) is used for manufacturing superheated steam pipes, boiling water pipes and locomotive boiler superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks. Hot-rolled and cold-drawn (rolled) seamless steel tubes of high-quality carbon structural steel for pipe use. 
  4. Seamless steel pipe for high-pressure boiler (GB5310-1995) is a high-quality carbon steel, alloy steel and stainless steel heat-resistant steel seamless pipe for the heating surface of water tube boilers for high pressure and above.
  5. High-pressure seamless steel pipe for chemical fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless steel pipe suitable for chemical equipment and pipelines with working temperature of -40~400 °C and working pressure of 10~30Ma. 
  6. Seamless steel pipe for petroleum cracking (GB9948-88) is a seamless pipe for furnace tubes, heat exchangers and pipes suitable for petroleum refineries. 
  7. Geological drilling steel pipe (YB235-70) is a steel pipe used for geological drilling by the geological department. It can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe according to the application. 
  8. Seamless core steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe for drill pipe, core rod and casing used for diamond core drilling. 
  9. Oil Drilling Pipe (YB528-65) is a seamless steel pipe used for thickening or external thickening at both ends of oil drilling. There are two kinds of steel pipe and no wire, the wire pipe is connected by a joint, and the non-wire pipe is welded by a butt welding method and a tool joint. 
  10. Carbon steel seamless steel pipe for ships (GB5213-85) is a carbon steel seamless steel pipe for the manufacture of ship class I pressure pipe system, class II pressure pipe system, boiler and superheater. The working temperature of the carbon steel seamless steel pipe wall does not exceed 450 ° C, and the working temperature of the alloy steel seamless steel pipe wall exceeds 450 ° C. 
  11. Seamless steel pipe for automobile semi-axle casing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe for the manufacture of automobile semi-axle casing and drive axle housing shaft tube. 
  12. High-pressure oil pipe for diesel engine (GB3093-2002) is a cold drawn seamless steel pipe for the manufacture of high-pressure pipes for diesel injection systems. 
  13. Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders (GB8713-88) is a cold drawn or cold rolled precision seamless steel pipe with precision inner diameter for the manufacture of hydraulic and pneumatic cylinders. 
  14. Cold drawn or cold rolled precision seamless steel pipe (GB3639-2000) is a cold drawn or cold rolled precision seamless steel pipe with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment.
The use of precision seamless steel tubes to manufacture mechanical structures or hydraulic equipment can greatly reduce machining time, improve material utilization, and improve product quality. 
  15.Structural stainless steel seamless steel pipe (GB/T14975-2002) is widely used in the chemical, petroleum, textile, medical, food, machinery and other industries of corrosion-resistant pipes and structural parts and parts of stainless steel hot rolled ( Squeeze, expand) and cold drawn (rolled) seamless steel tubes. 
  16. Stainless steel seamless pipe for fluid transportation (GB/T14976-2002) is a hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe made of stainless steel for conveying fluid. 

  17. Shaped seamless steel pipe is a general term for seamless steel pipes of other cross-section shapes other than round pipes. According to the shape and size of the cross-section of the steel pipe, it can be divided into the same wall thickness profiled seamless steel pipe (code D), the unequal wall thickness profiled seamless steel pipe (code BD), and the variable diameter profiled seamless steel pipe (code BJ). Shaped seamless tubes are widely used in a variety of structural parts, tools and mechanical parts. Compared with the round pipe, the special-shaped pipe generally has a large moment of inertia and a section modulus, and has a large bending and torsion resistance, which can greatly reduce the structural weight and save steel.

Product DescriptionThere are various types of seamless alloy steel pipes/tubes to meet or exceed your unique
Alloy steel pipe
Standard & Material:
GB5310-2013 Standard: 20G,25MnG, 15MoG,15CrMoG, 20MoG, 12CrMoG, 12Cr2MoG,12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 15CrMoG, 10CrMo910,
ASTM A209M/AS-209M Standard A209T1/SA209 T1, A209 T1b/SA-209 T1b, A209T1a/SA209 T1a
ASTM A213M/ASME SA 213 M Standard: T2, T5, T9, T11, T12, T22, T23, T24, T91, T911, T92, T122
ASTM A333M/ASME SA-333/SA333M Standard: Gr1, Gr3, Gr4, Gr6, Gr7,Gr8, Gr9, Gr10, Gr11
ASTM A334M/ASME SA-334/SA334M Standard: Gr1, Gr3, Gr6, Gr7,Gr8, Gr9, Gr11
ASTM A335/ASME SA335 Standard: P1, P2, P5,P5b, P5c, P9, P11, P12,P21,P22,P23, P24, P91, P92
ASTM A519 Standard: 4118, 4130,4135,4137,4140
ASTM A691 Standard GRADE 91, CM65, CM70, CM75, CMSH70, CMS75, CMSH80,
ASTM A691 Standard GRADE 1/2 Cr, GRADE 1CR, GRADE 1 1/4 CR, 2 1/4 Cr, 3CR, 5CR, 9 CR
DIN17175 Standard: ST35.8, ST45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63,12Cr1MoV
EN10216-2 Standard: P195GH, P235GH, P265GH, 13CrMo4-5, 10CrMo9-10, 16Mo3, 10CrMo5-5, X10CrMoVNb9-1
JIS G3458 Standard: STPA12, STPA20, STPA22, STPA23, STPA24, STPA25, STPA26
JIS G3441 Standard:SCR420 TK,SCM415 TK, SCM418 TK, SCM420TK, SCM430TK, SCM435TK, SCM440TK.
NF A49-213/215 Standard: TU15D3, TU13CD4-04, TU10CD910, TUZ10CD505
Alloy C276
BS3059 Standard: S1-622-440, S2-622-440, S1-622-490, S2-622-490, S1-629-470, S2-629-470, S2-629-590
BS3604Standard: HFS625 CFS625
BS3606Standard: CFS625
Alloy steel pipe Size:O.D:6-760mm W.T:1-80mm Fixed Length: 5.8m, 6m, 11.8m, 12m, or random length as required.

Product details

It is widely used in power plants and refineries to manufacture economizers, air preheaters, heat exchangers and evaporators working in high sulfur flue gas to resist condensation corrosion of sulfur flue gas. Steel pipes shall be delivered in the state of normalizing heat treatment

Detailed Images



OD :140mm
ID :5~25MM
Workers measure the dimensions of newly produced steel tubes
Temperature: 800-100 degrees Celsius


OD :140mm
ID :5~25MM
Workers measure the dimensions of newly produced steel tubes
Temperature: 800-100 degrees Celsius
HTB1P8_OX8Cw3KVjSZFlq6AJkFXaG_.webp.jpgHot-rolled seamless steel pipes are divided into general steel pipes, low and medium pressure boiler pipes, high pressure boiler pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.
Seamless steel pipes are generally made by hot rolling or cold rolling of high quality carbon-bonded steel 16Mn, 5MnV or alloy steel 40Cr, 30CrMnSi, 45Mn2 and 40MnB.HTB1QVovaOnrK1RjSsziq6xptpXa5_.webp.jpg

Packing & Delivery

Our CompanyFunctional use

1.  Buildings include: pipeline transportation at most, underground water extraction when building buildings, and boiler hot
  water transportation.
2.  Mechanical processing, bearing sleeves, processing machinery accessories, etc.
3.  Electrical: gas transmission, water power generation fluid pipeline.
4.  Anti-static pipes for wind power plants, etc.

Seamless steel pipes are widely used.

1.  General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy
   structural steel, with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.
2.  According to different purposes, it can be supplied in three categories:
3.  Supply according to chemical composition and mechanical properties;
4.  According to mechanical performance;
5.  According to the water pressure test supply. Steel pipes supplied according to categories a and b, if used to withstand liquid pressure, shall also undergo a hydraulic test.
6.  Special-purpose seamless pipes include seamless pipes for boilers, chemical and electric power, seamless steel pipes for
   geology, and seamless pipes for petroleum.

Seamless steel pipes have a hollow section and are used in large quantities as pipelines for conveying fluids, such as pipelines
for conveying oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe has a lighter weight when the bending and torsion strength is the same, and it is an economical section steel.

Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are used to make ring parts, which can improve material utilization, simplify manufacturing procedures, and save materials and processing. Working hours, steel pipes have been widely used for manufacturing.

Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.

CSPG  has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation. 

We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.

Our company adheres to the business philosophy of exceeding customer expectations and fulfilling employees' dreams, and keeps making progress to provide customers with reliable products and services.

Our products have been exported to Germany, South Korea, Russia, Malaysia, Pakistan, Thailand, India, Ukraine and other countries and regions. We sincerely welcome friends from all over the world to contact us and establish mutually beneficial business relations.


Q: How about the delivery terms?
A: 1. Payment: T/T,  30% deposit in advance and  balance before delivery.

    2. Min. Order Quantity:3TON or as required.

   3. Transportation: By express (DHL,TNT,),air,sea,and train.

Q: Do you accept sample order? 

A: Yes sure, please contact us for details.

Q: How about your after-sales service?

A: As a professional steel exporter, we offer promote technology support for all problems and questions.
Besides, we accept goods return or replace for quality problem.

Q: How does your company control the quality?

A: Quality first. In order to guarantee high quality for our products,
Modern always makes a serious inspection for all products and raw materials in strict procedure.

Why choose us?

1.  We're Gold Supplier.  Evaluated by  Alibaba.
2.  More than 9 years exprience, especially in cold rolled steel pipe industrty.
3.  Export to Korea, Pakistan, Brazil, Russia, India, Vietnam and other countries
4.  Work with many famous brands, such as Tisco, Baosteel.
5.  Quick response to your inquiry.
   Timely communication and feedback.
6.  Samples could be provided.
7.  Excellent production technology.
     Different shapes of products can be cut and provided.
8.  Strong production capacity. Fast delivery capacity. Quick supply capacity. 

9. Strict Quality Control and Inspection in every process.

Our Advantages
1. We are a specialized manufacturer. Competitive price and quality from our own factory .
2. Best service with 24 hour`s reply .
3. Flexible payment with T/T,L/C ,   etc .
4. Smooth production ability(1000tons/month).
5. Quick delivery and standard exporting package .