Standards for Seamless Steel Pipes
Customize and supply pipe products according to ASTM/ASME, DIN/EN, BS, JIS, GOST standards and user requirements.
Seamless steel pipe with outer diameter of 1/8" (10.3mm) ~ 56" (1422. 4mm) and wall thickness of 5.91" (150nm) or less.
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In industrial applications, it is crucial to select seamless steel pipes that meet standards. The standards of seamless steel pipes not only determine their manufacturing process, dimensional tolerances, chemical composition and mechanical properties, but also affect their scope of application and reliability. We fully cover international mainstream standards such as ASTM, ASME, DIN, EN, GB, JIS, etc., to meet the dual requirements of quality and compliance for various projects. The following is a classification of the main seamless steel pipe standards we support and their detailed descriptions.
Seamless Steel Pipe Standards Overview
ASTM / ASME Standards (USA)
Description: These standards are set by the American Society for Testing and Materials and the American Society of Mechanical Engineers. They are widely recognized and adopted for high-performance industrial piping systems.
Typical Grades: ASTM A106, A53, A335, A333, A213, ASME SA-106, SA-335
Main Applications:
- Oil & gas transmission pipelines
- High-temperature boilers and pressure vessels
- Refinery and chemical process piping
Key Features:
- Excellent high-temperature and pressure resistance
- Strict mechanical and chemical property requirements
- Comprehensive inspection and testing protocols
DIN / EN Standards (Germany & EU)
Description: German DIN and European EN standards are known for their precision and stringent dimensional tolerances. They are widely adopted in the EU and beyond for engineering and mechanical applications.
Typical Grades: DIN 2391, DIN 17175, EN 10216-1, EN 10216-2
Main Applications:
- Power generation systems and pressure equipment
- Automotive hydraulic systems
- Structural engineering and general machinery
Key Features:
- High dimensional accuracy and clean inner surfaces
- Excellent structural stability
- Strong resistance to deformation and fatigue
JIS Standards (Japan)
Description: The Japanese Industrial Standards are known for their emphasis on quality control, consistency, and high surface finish. They are widely adopted in Southeast Asia and Japanese-led engineering projects.
Typical Grades: JIS G3454, G3455, G3456, G3461, G3462
Main Applications:
- Boilers and heat exchangers
- Industrial pressure systems
- Automotive and machine components
Key Features:
- High-quality surface finish and consistent wall thickness
- Good machinability and weldability
- Excellent performance under thermal cycling
API Standards (American Petroleum Institute)
Description: API standards are tailored for the oil and gas industry, providing strict specifications for steel pipe used in petroleum transmission and casing operations.
Typical Grades: API 5L (Line Pipe), API 5CT (Casing and Tubing)
Main Applications:
- Oil and gas field pipelines
- Well casing and tubing in drilling operations
- Onshore and offshore pipeline systems
Key Features:
- Superior tensile strength and pressure resistance
- Extensive product traceability and inspection standards
- Suitable for sour service and H2S environments
Dexin Steel Tube (China) Co., Ltd
Professional Seamless Pipe Manufacturer
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2002
Year Established
60,000
Factory Area (m²)
20-30K
Monthly Capacity (tons)
220
Total Employees
Product Advantages
Specialized in large-diameter seamless pipes, maintaining 30,000 tons inventory covering carbon steel, alloy steel, stainless steel and more.
- Pipeline steel up to X80 grade
- Diameter below 1200mm
- Complete size range
- Fast delivery
Main Products
Professional production of various seamless pipes meeting high standards for petroleum, chemical, power and nuclear industries.
- Carbon steel pipes for pressure service
- Carbon steel pipes for high temperature
- Alloy steel boiler tubes
- Stainless steel pipes
- Steel pipes for low temperature
- Line pipes
Certifications
With complete quality management system, our products have safely operated over 100,000 hours with reliable quality.
- ISO 9001 Certified
- ISO 14001 Certified
- ISO 45001 Certified
- Sinopec Qualified Supplier
- CNPC Class A Supplier
Investments
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Electric Power Field -
Petroleum Field -
Chemical Industry -
Storage -
Nuclear Power Field
Why Choose Us
Professional Manufacturing
Relying on advanced technology and mature processes, focusing on high-precision and high-strength seamless steel pipe manufacturing.
Ten Thousand Tons of Inventory
30,000 tons of steel pipe inventory throughout the year, covering carbon steel, alloy, and stainless steel
Supply Chain Dual Engines
Integrate production and inventory resources to ensure zero delays and zero interruptions in project supply.
Full Specification Group
Provide full group sizes and diversified steel grade options to adapt to complex engineering scenarios.
Extreme Speed Delivery
Optimize production and logistics links to achieve industry-leading short-cycle delivery capabilities.
Pipeline Steel Specialization
Support X80 and below grade pipeline steel production, maximum adaptability to 1200mm caliber applications.
FAQs
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Q1: What is the difference between ASTM A106 and A53?
ASTM A106 is typically used for high-temperature services, whereas A53 is used for lower pressure applications. A106 has stricter chemical and mechanical requirements.
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Q2: Can DIN or EN pipes replace ASTM pipes?
In some cases, yes. However, you must compare wall thickness, mechanical strength, and tolerances. A cross-reference chart is strongly recommended.
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Q3: How do I choose the right pipe standard?
It depends on the application. Use ASTM or API for oil & gas, ASTM A335 for high-pressure boilers, EN/DIN for mechanical use, and JIS for automotive.
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Q4: Are Chinese GB standards equivalent to ASTM or EN?
Some GB standards align well with ASTM or EN, but not all. Always verify with a material certificate or request dual-standard compliance.
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Q5: What are the pressure ratings for different pipe standards?
Pressure ratings depend on wall thickness (schedule), grade, and temperature. ASTM and API standards provide detailed pressure-temperature charts.
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Q6: Can I use API 5L pipes for structural applications?
While possible, API 5L pipes are primarily designed for oil and gas transmission. For structural projects, ASTM A500 or EN 10210 may be more suitable.
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Q7: How can I verify if the pipe meets the required standard?
You should request a Mill Test Certificate (MTC), third-party inspection report, and check standard markings on the pipe surface.
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Q8: Do you offer dual-standard or multi-standard certified pipes?
Yes, we can supply pipes that meet both ASTM and EN or DIN standards simultaneously, depending on the grade and customer requirements.