Selecting the correct pipe for any industrial, commercial, or mechanical application can be a daunting task when you are faced with dozens of diameter options, wall thicknesses, and material grades. A reliable pipe chart simplifies this entire decision-making process by presenting all critical dimensional data in one standardized reference table. TOKO Tech has developed this comprehensive pipe chart guide to help engineers, procurement professionals, and project managers quickly identify the exact pipe size and schedule they need for their specific requirements. Our team has spent over fifteen years supplying high-quality stainless steel, duplex steel, and nickel alloy pipes to markets around the world, and we understand how vital accurate specifications are to project success. This guide walks you through every component of a pipe chart, explains how to interpret schedule numbers and nominal sizes, and provides a detailed reference table for NPS 1/8 inch through 12 inch with Schedule 40 and Schedule 80 data. You will also learn how TOKO Tech’s precision cutting, extensive inventory, and competitive pricing make us the ideal partner for your next pipe procurement. Whether you are designing a new piping system or sourcing replacement materials, this resource will equip you with the knowledge to make informed, confident decisions. Let us begin by exploring what a pipe chart actually is and why it remains an indispensable tool in the piping industry.

A pipe chart is a standardized reference table that organizes the key dimensional and mechanical properties of pipes into an easy-to-read format for engineers and buyers. The system is built around two primary identifiers: the Nominal Pipe Size (NPS) and the schedule number, which together define the outside diameter, wall thickness, and internal diameter of a pipe. This standardization was developed by organizations such as the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME) to ensure interchangeability and consistency across manufacturers and suppliers. When you look at a pipe chart, you will see that for each NPS value, there is a fixed outside diameter regardless of the schedule, while the wall thickness increases as the schedule number rises. This means that a 2-inch Schedule 40 pipe and a 2-inch Schedule 80 pipe share the same outside diameter but have different wall thicknesses, internal diameters, and weight per foot. Understanding this relationship is crucial because it directly affects the pressure rating, flow capacity, and structural strength of the piping system you are designing. Many professionals also use related references such as the pipe schedule chart to compare wall thickness options across multiple NPS values at a glance. Additionally, when working with threaded connections, a bsp thread chart is often consulted alongside the pipe chart to ensure compatible fitting engagement. For gas distribution networks, a gas pipe sizing chart helps determine the correct diameter and schedule based on flow rate and pressure drop. Even for systems using non-ferrous materials, a copper pipe size chart provides similar dimensional data, though the sizing conventions differ slightly. By mastering the pipe chart system, you gain the ability to select the safest and most cost-effective pipe for any fluid, gas, or structural application.

Every pipe chart is built around five fundamental components that work together to define a pipe’s geometry and performance characteristics. The first component is the Nominal Pipe Size (NPS), which is a numerical designation that loosely corresponds to the internal diameter of the pipe in inches for sizes up to 12 inches. The second component is the schedule number, a dimensionless index that indicates the wall thickness; common schedules include 40, 80, 160, and XXS, with higher numbers denoting thicker walls and higher pressure ratings. The third component is the outside diameter (OD), which remains constant for a given NPS regardless of schedule, allowing fittings and flanges to be universally compatible. The fourth component is the wall thickness, typically expressed in inches or millimeters, which directly drives the pipe’s pressure containment capability and mechanical strength. The fifth component is the weight per unit length, usually given in pounds per foot or kilograms per meter, which is essential for calculating shipping costs, structural loads, and support spacing. When you read a pipe schedule chart, you will notice that for each NPS and schedule combination, the chart lists the OD, wall thickness, and weight, enabling quick comparisons. It is also important to recognize that while the pipe chart focuses on standard steel pipe dimensions, related tools like the bsp thread chart are used for verifying thread pitch and sealing requirements on threaded ends. Similarly, a gas pipe sizing chart incorporates additional factors such as gas type, pressure, and allowable pressure drop to recommend the appropriate NPS and schedule for fuel gas systems. Even when dealing with copper tubing, a copper pipe size chart uses a different naming convention (CTS – Copper Tube Size) but follows a similar tabular format. Understanding these five components thoroughly allows you to decode any pipe chart with confidence and apply the data directly to your project specifications.

Using a pipe chart effectively requires a systematic approach that begins with measuring the outside diameter of your existing pipe or determining the required flow capacity for your new system. Start by using a caliper or a wrap-around measuring tape to obtain the outside diameter in inches, and compare that value against the OD column in the pipe chart to identify the corresponding NPS. Next, measure the wall thickness by subtracting the internal diameter from the outside diameter and dividing by two, or by using an ultrasonic thickness gauge for accuracy, and then match that thickness to the schedule column in the chart. For example, if you measure an outside diameter of 1.660 inches and a wall thickness of 0.140 inches, the pipe chart will show that this corresponds to NPS 1¼ with Schedule 40. Once you have identified the NPS and schedule, you can look up the weight per foot, internal diameter, and pressure rating to verify that the pipe meets your design requirements. It is also wise to consult a pipe sizing chart that incorporates flow rate, velocity, and pressure drop to confirm that the selected diameter is adequate for your application. If your system involves threaded joints, cross-reference the pipe chart with a BSP thread chart to ensure the thread pitch and taper angle match your fittings. For natural gas or propane installations, a dedicated gas pipe sizing chart will give you the maximum allowable length for a given NPS and schedule based on the British thermal unit (BTU) load. Even in projects that mix materials, such as connecting steel pipe to copper tubing, a copper pipe size chart will help you select the correct transition fitting. After you have verified all dimensions and performance parameters, you can confidently place your order with TOKO Tech, knowing that the pipe you choose will fit, seal, and perform as intended. This step-by-step process eliminates guesswork and reduces the risk of costly errors during installation or operation.

The table below provides a detailed reference for the most commonly used pipe sizes in Schedule 40 and Schedule 80 configurations, covering NPS 1/8 inch through 12 inch. For each entry, you will find the nominal pipe size, the outside diameter in inches, the wall thickness in inches, and the weight per foot in pounds for both schedules. This data is derived from the ANSI/ASME B36.10 standard and reflects the dimensions of carbon steel and stainless steel pipes that TOKO Tech supplies on a daily basis. Architects and engineers frequently use this pipe schedule chart to specify materials for structural columns, process piping, and utility lines. When reviewing the table, notice how the outside diameter increases steadily with NPS, while the wall thickness for a given schedule remains proportional to ensure consistent pressure ratings. The weight per foot values are particularly useful for calculating total material costs and designing pipe support systems. To make the most of this reference, keep in mind that Schedule 80 pipes have thicker walls and higher pressure ratings than Schedule 40 pipes of the same NPS, making them suitable for higher-pressure or more corrosive environments. If your application involves threaded connections, you should also consult a bsp thread chart to confirm thread compatibility with your chosen NPS. For fuel gas piping, a gas pipe sizing chart will help you determine whether Schedule 40 or Schedule 80 is required based on the gas load and run length. And when transitioning between steel and copper lines, a copper pipe size chart will guide the selection of dielectric unions or adapters. Use the table as a starting point, and always verify your final selection with the engineering specifications of your project.

The data in this pipe schedule chart clearly illustrates how Schedule 80 pipes offer significantly greater wall thickness and weight compared to Schedule 40 pipes of the same NPS, which translates directly into higher pressure ratings and greater durability. Engineers designing high-pressure steam systems, hydraulic lines, or chemical processing plants typically default to Schedule 80 or even higher schedules to ensure safety and longevity. For less demanding applications such as low-pressure water supply, drain lines, or structural handrails, Schedule 40 provides an economical balance of strength and cost. When you are working with a gas pipe sizing chart for a commercial kitchen or boiler room, you will often see recommendations for Schedule 40 for natural gas at low pressure and Schedule 80 for higher-pressure propane systems. Additionally, if your piping system includes threaded components, you should verify thread compatibility using a bsp thread chart, because British Standard Pipe threads have a different pitch than American National Standard Pipe Taper threads. For projects that mix ferrous and non-ferrous materials, a copper pipe size chart will help you select the correct adapter fitting to prevent galvanic corrosion. At TOKO Tech, we stock both Schedule 40 and Schedule 80 pipes in a wide range of NPS values and can provide custom cutting to your exact lengths. Our team is always available to help you interpret this table and select the optimal schedule for your operating conditions.

TOKO Tech has established itself as a leading supplier of stainless steel, duplex steel, and nickel alloy pipes by consistently delivering superior product quality, extensive inventory availability, and exceptional customer service. With over 2,000 tons of pipes in stock at any given time, we can fulfill orders of virtually any size quickly, reducing project downtime and keeping your construction or maintenance schedule on track. Our pipes are sourced from certified mills and undergo rigorous dimensional and mechanical testing to ensure compliance with ASTM, ASME, and GOST/EAC standards, so you can trust the specifications in every pipe chart we provide. We also offer precision cutting services that deliver clean, square ends and exact lengths, eliminating the need for secondary processing and reducing material waste on your job site. Competitive pricing is another cornerstone of our business model; we leverage our long-term relationships with mills and our efficient logistics network to offer some of the most attractive rates in the market without compromising on quality. Fast delivery is a commitment we take seriously, with most standard sizes shipping within 24 to 48 hours from our warehouse to domestic and international destinations. You can browse our full range of pipes, fittings, and flanges on ourProducts page, where each listing includes detailed dimensions and material certifications. To learn more about our company history, quality management system, and global client base, we invite you to visit our About Us page. For the latest industry news, product innovations, and company announcements, check our News page regularly. When you combine premium materials, expert support, and reliable delivery, it is clear why TOKO Tech is the preferred partner for pipe buyers around the world.

Beyond our product offerings, TOKO Tech differentiates itself through technical expertise and a customer-first approach that empowers clients to make the right purchasing decisions. Our sales engineers are well-versed in reading and interpreting pipe charts, pipe schedule charts, and specialized references such as the bsp thread chart, gas pipe sizing chart, and copper pipe size chart. They can help you navigate complex specifications, recommend the ideal material grade for corrosive or high-temperature environments, and advise on schedule selection based on your design pressure and temperature requirements. We also understand that every project has unique constraints, which is why we offer customized cutting, beveling, and threading services to meet your exact fabrication needs. Our commitment to quality extends to our packaging and documentation, ensuring that every order arrives with mill test reports, traceability records, and compliance certificates. If you need assistance with a particularly challenging application, our technical support team is just a call or email away, and you can reach them through ourSupport page. By choosing TOKO Tech, you gain a partner who is as invested in your project’s success as you are.

Understanding how to read and apply a pipe chart is an essential skill for anyone involved in the specification, procurement, or installation of piping systems. This guide has walked you through the definition of a pipe chart, its key components, the step-by-step process for using it, and a comprehensive reference table for NPS 1/8 inch to 12 inch in Schedule 40 and Schedule 80. You have also seen how related tools such as the pipe schedule chart, bsp thread chart, gas pipe sizing chart, and copper pipe size chart complement the pipe chart and provide additional layers of information for specialized applications. Armed with this knowledge, you can now approach your next project with confidence, knowing exactly how to identify the correct pipe size, schedule, and material for your specific needs. TOKO Tech stands ready to support you with high-quality steel pipes, precision cutting, competitive pricing, and fast delivery to any location. Whether you need a single length of Schedule 80 pipe for a repair or a full truckload of Schedule 40 pipe for a new construction project, we have the inventory and expertise to deliver. Do not leave your piping specifications to chance; contact TOKO Tech today to discuss your requirements and request a quote. You can start by visiting ourHome page to learn more about our full capabilities and get in touch with our team.

Shanghai Toko Technology Co., Ltd is a professional manufacturer and exporter of stainless steel, duplex steel, and nickel alloy pipes, fittings, and flanges with more than 15 years of industry experience. We maintain an extensive inventory of over 2,000 tons of pipes in various grades, sizes, and schedules, ensuring that we can meet the urgent demands of clients across the oil and gas, chemical processing, power generation, and construction sectors. Our products are certified under GOST/EAC and other international standards, reflecting our commitment to quality and safety in every order we fulfill. We export to markets in Russia, Central Asia, Southeast Asia, the Middle East, and beyond, and we have built a reputation for reliability, transparency, and technical excellence. Our team of experienced engineers and sales professionals works closely with each customer to provide tailored solutions, from material selection and pipe chart interpretation to logistics planning and after-sales support. We believe that the best way to serve our clients is to share our knowledge openly, which is why we publish guides like this one to help the industry make better-informed decisions. For more information about our company values, our team, and our global operations, please visit ourAbout Us page. For the latest updates on our products and industry trends, follow our News page. When you partner with TOKO Tech, you are choosing a supplier that combines deep technical expertise with a genuine dedication to your success.