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How Do You Measure 1 Inch Pipe?

Dec 4, 2024

For those who buy and install 1 inch steel pipe, knowing how to measure the pipe properly is very important. Whether you’re a contractor, supplier, or do-it-yourselfer, knowing how to get the measurements of a 1 inch piping is essential in making sure that you buy the right pipe fit for the needs of your project. In the course of this article, we shall digest the whole process of measuring 1 inch pipe and take a look at the industrial standards for their sizing in addition to pointing out other complex specifications that should be considered when selecting steel pipe.

1 inch steel pipe 20 ft

Understanding 1 Inch Steel Pipe Measurements

Before diving into the measuring process, it’s important to understand the two primary measurement systems used for steel pipes: nominal pipe size (NPS) and actual pipe diameter. While 1 inch pipe refers to the nominal pipe size, the actual measurement of the pipe’s diameter might differ slightly due to the thickness of the walls.

  • Nominal Pipe Size (NPS): The 1 inch refers to the nominal diameter of the pipe, which is an arbitrary number used for convenience. The nominal size represents the approximate internal diameter, which can vary slightly depending on the pipe’s schedule (thickness).
  • Outside Diameter (OD): The outside diameter of a 1 inch steel pipe is standardized at 1.315 inches (33.4 mm), regardless of the wall thickness.
  • Wall Thickness (Schedule): The wall thickness of the pipe determines its schedule, such as Schedule 40, Schedule 80, or others, which affect its strength and capacity to withstand pressure. A 1 inch steel pipe 20 ft long could come in various schedules, impacting its application and cost.

Measuring a Steel Pipe: The Basics

When you’re tasked with measuring a 1 inch pipe, there are two critical measurements you need to focus on: the outside diameter (OD) and the wall thickness. Both of these factors will influence the overall size and performance of the pipe.

  1. Outside Diameter (OD): As mentioned earlier, for a 1 inch pipe, the OD is typically 1.315 inches. This measurement remains constant across different schedules of steel pipe.
  2. Wall Thickness: The wall thickness is an essential measurement as it impacts the internal diameter and the pipe’s pressure rating. To find the wall thickness, use a caliper or micrometer to measure across the pipe wall.
  3. Length of the Pipe: The length of the pipe is also crucial, especially for larger projects. For example, 1 inch steel pipe 20 ft is a common length used in various industries. The length affects shipping costs, ease of handling, and installation.

Different Pipe Standards and Schedules

  • ASTM A53 Steel Pipe: This is one of the most common standards for steel pipe used in construction and industrial applications. ASTM A53 pipes are used for water, oil, and gas pipelines, and they come in different schedules that denote the thickness and pressure rating.
  • Schedule 40 vs. Schedule 80: Schedule 40 pipes are typically thinner and designed for lower pressure systems, while Schedule 80 pipes have thicker walls, making them suitable for high-pressure applications. It’s essential to choose the right schedule when measuring and purchasing steel pipes.

Why Choose Our 1 Inch Steel Pipe?

As a trusted manufacturer and supplier of 1 inch steel pipe, we offer a wide range of options to suit your needs. Our products adhere to global standards, including ASTM A53 steel pipe, ensuring durability and reliability. We provide OEM & ODM services, offering tailored solutions for your specific requirements.

  • OEM & ODM Customization: We can manufacture 1 inch steel pipes according to your specifications, including custom lengths like 1 inch steel pipe 20 ft or other tailored sizes.
  • Wholesale Options: Whether you’re a large-scale contractor or a local distributor, we offer competitive prices and bulk purchasing options for steel pipe buyers worldwide.
  • Durability & Quality: Our steel pipes are manufactured using the highest quality materials, ensuring long-lasting performance in all conditions.

What to Consider When Purchasing Steel Pipe?

  1. Application Requirements: Always consider what the pipe will be used for. Are you transporting gas, water, or oil? The application will determine the necessary pipe thickness and material.
  2. Pipe Specifications: Know your requirements regarding the size (1 inch or other), length, schedule, and material of the pipe. Our extensive range of steel pipe products ensures that you get exactly what you need.
  3. Shipping and Logistics: Consider the logistical aspects, especially if you are purchasing 1 inch steel pipe 20 ft lengths. Longer pipes might require special shipping arrangements to prevent damage.

Contact Us for Your Steel Pipe Needs

As a leading manufacturer of steel pipes, we are committed to providing high-quality solutions tailored to your needs. Whether you need 1 inch steel pipe for residential, commercial, or industrial projects, we offer comprehensive solutions and expert advice.

For more information on pricing, custom orders, or technical specifications, don’t hesitate to contact us at manager@topregalsteel.com. Our team is ready to provide you with a detailed quote and ensure timely delivery of your steel pipe orders.

If you’re a local wholesaler or supplier looking to expand your product offerings, we welcome the opportunity to collaborate. Reach out today to explore how we can serve your market with reliable steel pipes at competitive prices.


This article is designed to help you measure and select the right 1 inch steel pipe for your needs. By understanding the key differences and measurements, you can make informed decisions and ensure your projects proceed without a hitch. Whether you’re working with ASTM A53 steel pipe or looking for high-quality steel pipe China options, we provide a wide range of products for your requirements.