ALLLAND Boiler Steel Pipe Supply
Welcome to ALLLAND Steel Pipe Manufacturing Company. Our API 5L pipes are strictly produced in compliance with standards and meet all usage requirements. They have been exported to numerous countries and received widespread acclaim. Leveraging mature production techniques and advanced production lines, ALLLAND independently manufactures SMLS/ERW/SSAW/LSAW pipes and conducts comprehensive testing. Our current production capabilities span steel grades from Grade B to X120, covering various levels including PSL1 and PSL2. Pipes can be customized with anti-corrosion coatings, galvanization, and other finishes per client requirements. Inquiries are welcome.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience. The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines. With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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API 5LPIPE is a standard developed by the American Petroleum Institute (API), where API stands for the “American Petroleum Institute.” It specifies the manufacturing requirements for both seamless and welded steel pipes in PSL1 and PSL2 grades. API 5L PIPE is used not only for onshore pipelines but also for subsea pipelines and transportation in high-temperature and high-pressure environments.
O.D.:
SMLS 1/2″ – 24″ / ERW 1/2″ – 20″/ LSAW 16″ – 60″/ SSAW 20″ – 100″
W.T.:
SCH 10/ SCH 20/ SCH 40/ SCH 80/ SCH 160/ XS / XXS
Length:
6-12 m, available in fixed or multiple lengths; custom lengths per project requirements.
Process:
ERW/ LASW/ SSAW/ SMLS
Standards:
API 5L / ASTM A53 (partial specifications may be comparable) / ASTM A106 (substitute in certain scenarios)
Steel Grades:
X42, X46, X52, X56, X60, X65, X70, X80, X100
Tube Ends& Surface Treatment:
Square, Chamfered; Black Skin, Pickled, Painted/Oiled for Rust Prevention
Delivery Conditions:
Grade, Specification, Furnace Number, Standard
Common pipe grades include: X42, X46, X52, X56, X60, X65, X70, X80, X100, etc. The numbers indicate the minimum yield strength (in psi) that the pipe can withstand. For instance, API 5L X42, API 5L X52, and API 5L X60 are common grades for different pressure levels and working conditions. Below are the detailed descriptions of these three grades
Strength Grade: X42 represents a minimum yield strength of 42,000 psi(approximately 290 MPa).
Chemical Composition: Low carbon and moderate manganese content, offering good weldability and toughness.
Manufacturing Process: Typically produced by hot rolling or cold drawing, and can be made into seamless or welded pipes.
Applications: Low-pressure oil and gas pipelines, city gas transmission networks, general industrial pipelines
Advantages: Cost-effective, suitable for applications with lower strength requirements. Excellent weldability, making it convenient for on-site installation and maintenance.
Strength Grade: X52 represents a minimum yield strength of 52,000 psi (approximately 360 MPa).
Chemical Composition: Higher carbon and manganese content than X42, with possible additions of microalloying elements (e.g., niobium, vanadium) to improve strength.
Manufacturing Process: Produced by hot rolling, cold drawing, or high-frequency resistance welding.
Applications: Medium-pressure oil and gas pipelines, long-distance natural gas transmission pipelines, offshore platform pipelines.
Advantages: Higher strength than X42, suitable for medium-to high-pressure transportenvironments. Excellent corrosion resistance and low-temperature toughness.
Strength Grade: X60 represents a minimum yield strength of 60,000 psi (approximately 414 MPa).
Chemical Composition: Increased carbon and manganese content, with added alloying elements (such as niobium, vanadium, titanium) to enhance strength and toughness.
Manufacturing Process: Produced using thermomechanical control processing (TMCP) or quenching and tempering processes.
Applications: High-pressure oil and gas pipelines, subsea oil and gas field development, pipeline projects in polar or low-temperature environments.
Advantages: High strength, suitable for high-pressure and harsh environmental applications. Excellent low-temperature toughness and crack propagation resistance
When choosing steel grades, it is important not only to focus on the strength numbers. For pipelines used in harsh environments, such as low-temperature, deep-sea, or seismic-active areas, it is crucial to ensure the material also has sufficient toughness. The selection of API 5L PIPE should take into account the different pressure and temperature conditions that each grade is designed for.
PSL refers to the product specification levels, classified into two categories: PSL1 and PSL2, which represent different manufacturing and quality control requirements.
Among these, the mandrel process is optimal for boiler tube manufacturing. This method involves elongating the billet in a multi-stand machine to reduce wall thickness, ensuring surface quality and uniform wall thickness.
Before purchasing API 5L PIPE, it is essential to verify the dimensions and specifications of the pipe to ensure compliance with relevant requirements. Please refer to the following table to confirm whether a particular pipe meets the required standards.
Table 2: Typical Seamless and Welded API 5L PIPE Dimensions and Weight Reference
(Below dimensions are common market specifications, actual production range is much larger)
| Nominal Pipe Size (NPS) | Outer Diameter (OD) mm | Wall Thickness (WT) Range mm | Unit Weight Reference (kg/m) | Common Manufacturing Processes |
| 2″ | 60.3 | 3.91 – 7.92 | 5.5 – 10.5 | Seamless (SMLS) or High-Frequency Welded (HFW) |
| 4″ | 114.3 | 6.02 – 11.13 | 16.1 – 28.4 | Seamless (SMLS), High-Frequency Welded (HFW), or Submerged Arc Welded (SAW) |
| 8″ | 219.1 | 6.35 – 18.26 | 33.4 – 90.6 | Mainly SAW, also seamless |
| 12″ | 323.9 | 7.92 – 20.62 | 62.1 – 155.0 | SAW, Longitudinal/Spiral Weld |
| 16″ | 406.4 | 7.92 – 26.19 | 78.0 – 245.0 | SAW, Longitudinal/Spiral Weld |
| 24″ | 609.6 | 9.53 – 32.54 | 141.0 – 462.0 | Double Submerged Arc Welded (DSAW), Spiral Welded (HSAW) |
| 36″ | 914.4 | 12.70 – 35.71 | 283.0 – 786.0 | DSAW, HSAW |
| 48″ | 1219.2 | 14.27 – 39.67 | 424.0 – 1150.0 | DSAW |
Note: Unit weight is an estimate based on carbon steel density of 7.85g/cm³. Actual weight should be calculated based on specific wall thickness.
When selectingAPI 5L PIPE, consider the following factors:
Pipeline Pressure Grade: Choose the appropriate pipe grade (e.g., X42, X60, X70) based on the pressure of the fluid being transported.
Pipe Size and Wall Thickness: Select the right outer diameter and wall thickness based on the transport capacity and distance.
Environmental Factors: If the pipeline will be exposed to corrosive environments (e.g., seawater, chemical gases), choose API 5L PIPE with anti-corrosion features or undergo special anti-corrosion treatments.
Welding Requirements: If welding is needed on-site, ensure the pipe has good weldability.
As an experienced manufacturer of API 5L PIPE, we offer high-quality, customized pipe products to meet your diverse needs. By choosing us, you will benefit from:
Obtained quality management system certification, environmental management system certification, and more.
High business credibility and performance capabilities.
Factory located in Hebei Cangzhou Industrial Park, a major steel pipe manufacturing area in China.
Complete production process from raw material intake, plate inspection, welding to finished product delivery, with an independent anti-corrosion processing line for multi-layer anti-corrosion pipes.
Strict inspection processes at key stages, including raw material inspection, production process control, weld inspection, and X-ray testing.
Multiple successful project bids and supplier qualification records
Custom design and production services based on customer-specific requirements, as well as full after-sales support to ensure smooth project execution.
ALLLAND Steel Pipe has the capacity to handle large-scale projects and holds API certification. With three production lines, it can produce API-certified spiral welded pipes, longitudinal welded pipes, and seamless steel pipes, all of which are certified products.Choosing the right API 5L PIPE ensures the safety and long-term operation of your project. We hope this information helps you select the right steel products. If you have more questions, feel free to ask
