Hot Rolled Q195, Q235/Q235B, Q255, Q275, Q345/Q345B, Q420, Q550 Carbon Welded&Seamless Black Steel Round Pipe
| Category | Details |
| Material Standards | Chinese Standard (GB/T): GB/T 8162 (Seamless Structural Pipe), GB/T 8163 (Seamless Fluid Pipe), GB/T 9711 (Pipeline Steel) |
| European Standard (EN): EN 10210 (Hot Finished Structural Hollow Sections), EN 10216 (Seamless Pressure Pipes), EN 10217 (Welded Pipes) | |
| American Standard (ASTM/ASME/API): ASTM A53, ASTM A106, ASTM A333, ASTM A500, ASTM A671/A672, API 5L, API 5CT | |
| Available Dimensions | Outer Diameter (OD): 1/2” – 48” (21.3–1219mm) |
| Wall Thickness (WT): SCH10–SCH160 / 2mm–100mm | |
| Length: 6m, 9m, 12m; Customized length available | |
| Production Methods | Seamless: Hot-rolled / Cold-drawn (CDS) |
| Welded: ERW, LSAW/SAWL, SSAW/SAWH | |
| Surface Condition | - Black coating |
| - Oil-coated / Anti-rust oil | |
| - Galvanized (Hot-dip / Electro-galvanized) | |
| - 3PE / 3PP / FBE coating | |
| - Sand-blasted (SA2.0 / SA2.5) | |
| - Painted (custom RAL colors) | |
| Processing Services | - Cutting (fixed-length/custom-length) |
| - Grooving / Threading | |
| - Beveling / Chamfering | |
| - Drilling / Punching | |
| - Bending / Forming | |
| - Welding fabrication | |
| - Internal/external coating | |
| Inspection & Testing | - Hydrostatic testing (Pressure test) |
| - Ultrasonic testing (UT) | |
| - Magnetic particle testing (MT) | |
| - X-ray / Radiographic testing (RT) | |
| - Chemical composition & mechanical testing | |
| - Third-party inspection (SGS / BV / TUV / ABS) | |
| Packaging Options | - Steel bundle with straps |
| - Steel frame packing | |
| - Plastic caps on both ends | |
| - Woven bags or waterproof wrapping | |
| - Palletized packing | |
| - Suitable for container loading (20GP/40GP/40HQ) |
Size Chart:
| DN |
OD Outside Diameter |
ASTM A36 GR. A Round Steel Pipe | BS1387 EN10255 | ||||
| SCH10S | STD SCH40 | LIGHT | MEDIUM | HEAVY | |||
| MM | INCH | MM | (mm) | (mm) | (mm) | (mm) | (mm) |
| 15 | 1/2” | 21.3 | 2.11 | 2.77 | 2 | 2.6 | - |
| 20 | 3/4” | 26.7 | 2.11 | 2.87 | 2.3 | 2.6 | 3.2 |
| 25 | 1” | 33.4 | 2.77 | 3.38 | 2.6 | 3.2 | 4 |
| 32 | 1-1/4” | 42.2 | 2.77 | 3.56 | 2.6 | 3.2 | 4 |
| 40 | 1-1/2” | 48.3 | 2.77 | 3.68 | 2.9 | 3.2 | 4 |
| 50 | 2” | 60.3 | 2.77 | 3.91 | 2.9 | 3.6 | 4.5 |
| 65 | 2-1/2” | 73 | 3.05 | 5.16 | 3.2 | 3.6 | 4.5 |
| 80 | 3” | 88.9 | 3.05 | 5.49 | 3.2 | 4 | 5 |
| 100 | 4” | 114.3 | 3.05 | 6.02 | 3.6 | 4.5 | 5.4 |
| 125 | 5” | 141.3 | 3.4 | 6.55 | - | 5 | 5.4 |
| 150 | 6” | 168.3 | 3.4 | 7.11 | - | 5 | 5.4 |
| 200 | 8” | 219.1 | 3.76 | 8.18 | - | - | - |
Chemical Composition:
| Standard | C | Si | Mn | P | S |
| Q195 | ≤0.12% | ≤0.30% | 0.25-0.50% | ≤0.050% | ≤0.045% |
| Q235 | ≤0.22% | ≤0.35% | 0.30-0.70% | ≤0.045% | ≤0.045% |
| Q245 | ≤0.20% | ≤0.35% | 0.50-1.00% | ≤0.035% | ≤0.035% |
| Q255 | ≤0.18% | ≤0.60% | 0.40-1.00% | ≤0.030% | ≤0.030% |
| Q275 | ≤0.22% | ≤0.35% | 0.50-1.00% | ≤0.035% | ≤0.035% |
| Q345 | ≤0.20% | ≤0.50% | 1.70-2.00% | ≤0.035% | ≤0.035% |
| Q420 | ≤0.20% | ≤0.50% | ≤1.70% | ≤0.030% | ≤0.025% |
| Q550 | ≤0.20% | ≤0.60% | ≤2.00% | ≤0.030% | ≤0.025% |
| Q690 | ≤0.20% | ≤0.80% | ≤2.00% | ≤0.020% | ≤0.015% |
| C45 | 0.42-0.50% | 0.17-0.35% | 0.50-0.80% | ≤0.040% | ≤0.040% |
| A53 | ≤0.25% | ≤0.35% | 0.95-1.35% | ≤0.030% | ≤0.030% |
| A106 | ≤0.30% | ≤0.35% | 0.29-1.06% | ≤0.035% | ≤0.035% |
The thickness is produced inaccordance with the contract.Our company process the thicknesstolerance is within ±0.01mm.Laser cutting nozzle, the nozzle issmooth and neat.Straight Carbon Steel Pipe, galvanizedsurface.Cutting length from 6-12meters ,wecan provide American standard length20ft 40ft.Or we can open mold to customizeproduct length,such as 13 meter ect.50.000m.warehouse.tproduces morethan 5,000 tons ofgoods per day.so we can providethem with fastestshipping time andcompetitive price
Carbon Steel Pipe Exporter is a metal pipe composed of carbon and iron elements. It has the following characteristics:
Carbon steel pipes are renowned for their high strength and hardness, making them ideal for withstanding heavy loads and high-pressure conditions. This property ensures excellent performance in structural support and the transportation of liquids and gases.
With superior toughness and wear resistance, carbon steel pipes are well-suited for carrying both hot and cold fluids, as well as abrasive substances, maintaining durability under demanding conditions.
Although carbon steel pipes offer good corrosion resistance, they can be affected by harsh external environments, especially in humid or highly corrosive media, where rust and corrosion may occur if not properly protected.
Processability is another key advantage: carbon steel pipes are easy to cut, weld, thread, and customize, providing flexibility for various industrial and construction projects.
From an economic perspective, carbon steel pipes are cost-effective and budget-friendly, offering an excellent balance between performance and price.
Widely applied across multiple industries, carbon steel pipes are essential in petroleum, natural gas, chemical processing, aerospace, aviation, and machinery manufacturing. They are also commonly used in construction, shipbuilding, and bridge projects, playing a crucial role in the safe and efficient transport of liquids and gases.
Main Application:
Oil & Gas Industry
- Transportation of crude oil, natural gas, and refined petroleum products.
- Used in pipelines, risers, and drilling operations.
Chemical & Petrochemical Industry
- Transporting corrosive and high-temperature chemicals.
- Suitable for process piping in chemical plants and refineries.
Water & Steam Transport
- Hot and cold water pipelines.
- Steam and condensate transport in power plants and factories.
Construction & Infrastructure
- Structural support in buildings, bridges, and industrial facilities.
- Scaffolding, fencing, and frame structures.
Shipbuilding & Marine Engineering
- Piping systems for ships, docks, and offshore platforms.
- Transport of fuel, water, and compressed air on vessels.
Machinery & Automotive Manufacturing
- Hydraulic and pneumatic systems.
- Structural and mechanical components in machinery and vehicles.
Aerospace & Aviation
- Specialized applications requiring high strength and toughness.
- Fuel, hydraulic, and support pipelines in aerospace equipment.
Energy & Power Industry
- High-pressure pipelines in thermal, nuclear, and renewable energy plants.
- Boiler tubes and heat exchangers.
Note:
1. Free sampling, 100% after-sales quality assurance, Support any payment method;
2. All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.
Process of production
Carbon Steel Pipe Factory
First of all, raw material uncoiling: The billet used for it is generally steel plate or It is made of strip steel, then the coil is flattened, the flat end is cut and welded-looper-forming-welding-inner and outer weld bead removal-pre-correction-induction heat treatment-sizing and straightening-eddy current testing-cutting- Water pressure inspection—pickling—final quality inspection and size test, packaging—and then out of the warehouse.
Packaging is generally naked, steel wire binding, very strong.
If you have special requirements, you can use rust proof packaging, and more beautiful.
1. Cargo packaging
High Carbon Steel Pipe is a metal material that is prone to rust and needs to be packaged and protected during transportation. Generally, wooden boxes, cartons or plastic films are used for packaging to prevent carbon steel products from direct contact with the atmosphere and moisture, which may cause rust and oxidation. At the same time, the packaging of goods should comply with transportation specifications and standards to ensure that the goods are not damaged during transportation.
2. Transportation environment
The transportation environment is the key to whether carbon steel can reach its destination safely. The first thing you need to pay attention to is temperature and humidity to avoid extreme high, low and high humidity conditions during transportation, which may cause the goods to get damp or freeze to crack. Secondly, attention should be paid to the isolation between goods and other goods to avoid collisions, friction, etc. during transportation, resulting in damage to the goods.
3. Loading and unloading operations
Loading and unloading operations are the most problematic aspects of carbon steel transportation. During loading and unloading operations, special hoists, forklifts and other machinery are required to prevent excessive squeezing, pulling, beating and other operations. In addition, safety protection measures need to be taken before operation to avoid safety risks to personnel and the environment caused by improper operation.
To sum up, carbon steel transportation must not only pay attention to cargo packaging and transportation environment, but also pay attention to loading and unloading operations, so as to ensure that carbon steel single-axle vehicles, carbon steel bicycles and other goods can be transported safely and stably to their destinations.
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Our Customer
Q: Are u a manufacturer?
A: Yes, we are a manufacturer. We have our own factory located in Daqiuzhuang Village, Tianjin City, China. Besides, we cooperate with many state-owned enterprises, such as BAOSTEEL, SHOUGANG GROUP, SHAGANG GROUP,etc.
Q: Can I have a trial order only several tons?
A: Of course. We can ship the cargo for u with LCL serivece.(Less container load)
Q: Do u have payment superiority?
A: For big order, 30-90 days L/C can be acceptable.
Q: If sample free?
A: Sample free, but the buyer pays for the freight.
Q: Are you gold supplier and do trade assurance?
A: We 13 years gold supplier and accept trade assurance.
