When it comes to ordering ASTM A135 pipes for your projects, understanding the process of customizing lengths can be crucial for ensuring you get exactly what you need. This article will guide you through the intricacies of ordering A135 pipes in custom lengths, covering everything from standard length ranges to manufacturing tolerances and specifications.
Standard Length Range
ASTM A135 pipes are electric-resistance welded steel pipes commonly used in fire protection systems, sprinkler systems, and other applications requiring reliable, high-quality piping. These pipes are known for their strength, durability, and resistance to corrosion, making them a popular choice in various industries.
The standard length range for ASTM A135 pipes typically falls between 20 feet (6.1 meters) and 40 feet (12.2 meters). However, it's important to note that these lengths can vary depending on the manufacturer and specific production capabilities. Some producers may offer lengths up to 50 feet (15.2 meters) or even longer for certain diameters.
When considering custom lengths for ASTM A135 pipes, it's essential to understand that while manufacturers can accommodate various length requirements, there may be practical limitations based on factors such as:
- Production equipment capabilities
- Transportation restrictions
- Handling and storage considerations
- Cost-effectiveness of production runs
It's always advisable to consult with your chosen manufacturer about their specific capabilities and any potential limitations when ordering custom-length ASTM A135 pipes.
Manufacturing Tolerances for Custom-Length ERW Pipes
When ordering ASTM A135 pipes in custom lengths, it's crucial to be aware of the manufacturing tolerances that apply. These tolerances ensure that the pipes meet the required specifications while allowing for slight variations that may occur during the production process.
For ASTM A135 pipes, the length tolerances are generally as follows:
- For specified lengths up to 30 feet (9.1 meters): +1/4 inch (6.4 mm), -0
- For specified lengths over 30 feet (9.1 meters): +1/2 inch (12.7 mm), -0
It's important to note that these tolerances are typical for A135 pipes, but manufacturers may have slightly different tolerances based on their production capabilities and quality control standards. Always verify the exact tolerances with your chosen manufacturer when placing an order for custom-length pipes.
In addition to length tolerances, other important manufacturing tolerances for ASTM A135 pipes include:
- Outside Diameter (OD) tolerance: ±1% of the specified OD
- Wall Thickness tolerance: +15%, -12.5% of the nominal wall thickness
- Weight tolerance: ±10% of the nominal weight per foot
These tolerances ensure that the pipes meet the required specifications while allowing for minor variations that may occur during the manufacturing process. When ordering custom-length ASTM A135 pipes, it's essential to consider these tolerances to ensure that the pipes will fit your specific application requirements.
Specifying Wall Thickness, Grade, and Length in A135 Pipe Orders
When placing an order for ASTM A135 pipes in custom lengths, it's crucial to provide clear and accurate specifications to ensure you receive the correct product. Here's a guide on how to specify wall thickness, grade, and length in your A135 pipe orders:
Wall Thickness
A135 pipes are available in various wall thicknesses, typically specified using one of two methods:
- Nominal Wall Thickness: Expressed in inches or millimeters (e.g., 0.280 inches or 7.11 mm)
- Schedule Number: Common schedules include 10, 40, and 80 (e.g., SCH 40)
When specifying wall thickness, ensure you clearly state which method you're using to avoid any confusion. For example:
"ASTM A135 pipe, 4-inch nominal diameter, 0.237-inch wall thickness" or "ASTM A135 pipe, 4-inch nominal diameter, Schedule 40"
Grade
A135 pipes are available in two grades:
- Grade A: Minimum yield strength of 30,000 psi (205 MPa)
- Grade B: Minimum yield strength of 35,000 psi (240 MPa)
Specify the required grade clearly in your order. For example:
"ASTM A135 Grade B pipe"
Length
When ordering custom-length ASTM A135 pipes, be sure to specify the exact length required, including any allowances for cutting or fitting. It's also helpful to indicate whether the specified length is the minimum acceptable length or if it's an exact requirement. For example:
"ASTM A135 Grade B pipe, 4-inch nominal diameter, Schedule 40, 25 feet 6 inches long (minimum length)"
If you require multiple pipes of the same specifications but different lengths, clearly list each length requirement separately.
Additional Specifications
Depending on your project requirements, you may need to specify additional parameters such as:
- End finish (plain end, beveled end, threaded, etc.)
- Surface finish (black, painted, galvanized, etc.)
- Any required certifications or testing
By providing clear and comprehensive specifications when ordering ASTM A135 pipes in custom lengths, you can ensure that you receive the exact product you need for your project.
Longma Group Custom ASTM A135 pipe
Ordering A135 pipes in custom lengths requires careful consideration of various factors, including standard length ranges, manufacturing tolerances, and precise specifications. By understanding these aspects and clearly communicating your requirements, you can ensure that you receive the right pipes for your project, minimizing waste and potential delays.
At Longma Group, one of China's leading manufacturers of ERW/LSAW steel pipes since 2003, we're dedicated to setting industry standards with our unwavering commitment to quality and service excellence. Boasting an impressive annual output that surpassed 1,000,000 tons by the end of 2023, we've built a robust infrastructure and cutting-edge production capabilities that enable us to efficiently serve clients, regardless of the scale and complexity of their projects.
Our ASTM A135 pipe is a prime example of our dedication to excellence. Available in Grade B, it features ERW welding and offers a wide range of outer diameters (1/4" - 20") and thicknesses (SCH10 - SCH160), making it suitable for various applications.
Ready to explore how our solutions can enhance your next project? Contact us today at info@longma-group.com to learn more about our products and services.
References
- ASTM International. (2021). ASTM A135 / A135M - 21 Standard Specification for Electric-Resistance-Welded Steel Pipe.
- American Society of Mechanical Engineers. (2019). ASME B36.10M - Welded and Seamless Wrought Steel Pipe.
- Piping Engineering. (2022). Pipe Wall Thickness and Schedule Selection Guide.
- Steel Tube Institute. (2023). ERW Steel Pipe Manufacturing Process and Tolerances.
