API 5L SSAW Steel Pipe Sizes

　　Spiral Submerged Arc Welded (SSAW) Pipes are available in a variety of sizes, typically measured by outside diameter (OD) and wall thickness. The most common size range is 16 inches to 100 inches (406mm - 2540mm) OD and 6mm to 25.4mm wall thickness. Custom sizes are also available to meet specific project requirements.

　　1. Small to Medium (16-36 inches)

　　● 16-20 inches: These sizes are commonly used in municipal water supply and drainage systems, as well as low-pressure oil and gas pipelines. Their relatively small size makes them easy to handle and install, ideal for small to medium-sized projects.

　　● 24-36 inches: This size range is commonly used for medium-pressure oil and gas pipelines, as well as structural applications such as building framing and bridges. They strike a good balance between strength and cost, suitable for a variety of projects.

　　2. Large Size (40-100 inches)

　　● 40-60 inches: These larger sizes are typically used for high-pressure oil and gas trunk lines and large-scale water supply and drainage projects. Larger inner diameters allow for higher flow velocities, making them ideal for transporting large volumes of fluid over long distances.

　　● 72-100 inches: This is the largest size achievable with SSAW steel pipes, commonly found in large-scale water diversion projects, urban ring roads, or offshore platform jacket structures. These extra-large diameter pipes are typically custom-made to meet the specific requirements of each project.

　　3. SSAW Steel Pipe & Tube Sizes Chart

　　The following is a table showing the common combinations of outer diameter and wall thickness for SSAW pipes (in mm).

　　SSAW Steel Pipes Application Size Selection Recommendation Table:

　　Steel Grade and Size Production Capacity Description:

　　a. Q235B/Q345B: All spiral pipe manufacturers can produce this; it is a standard material suitable for water supply, structural applications, and general fluid transportation.

　　b. X42–X52: Mainstream manufacturers can produce this according to API 5L standards; it is a common steel grade for export markets and oil and gas projects.

　　c. X56–X65: Capable manufacturers can produce this; it usually requires GB/T 9711 or API 5L PSL2 certification.

　　d. X70: Only a few leading companies can produce this; it requires API 5L PSL2 qualification and is used in national trunk pipeline networks.

　　e. X80 and above: Very few large companies can produce this; SSAW faces technical bottlenecks in the high-grade steel field, and large-diameter high-pressure pipelines increasingly use straight seam submerged arc welded pipes (LSAW).

　　SSAW Steel Pipe Sizes also needs to meet specific technical requirements,It typically needs to meet API 5L PSL2 standards;It may require special coatings such as 3PE anti-corrosion coating;It needs to confirm production capacity and delivery time with the manufacturer in advance Email : pipe@stpipefitting.cn.