Welded Steel Pipe Design

This course provides useful information for the design of water transmission lines and distribution systems using welded steel pipes. It also discusses the major developments of steel pipe that occurred throughout the course of human history. Welded steel pipe is available in a wide range of sizes and properties of the steel. The demand for welded steel pipes will increase in the future and worldwide demand for more cost-effective transportation will become urgent.

This course also presented the design criteria for steel pipe up to 240 inch (6,000 mm) in diameter under either internal or external pressure. The requirements of buried flexible pipe are the following:  strength, ease of installation, high flow capacity, leak resistance, long service life, reliability and versatility, and economy. The properties of steel are well adapted to these seven requirements of buried pipelines.

Furthermore, structural analysis of buried, flexible steel pipe is also presented in this course.  Structural analysis is the analysis of the interaction of the pipe and the soil in which it is embedded. The design of buried steel pipe is based on: principles of engineering mechanics, properties of materials (both pipe and soil), and performance limits. At performance limits (beyond the elastic limit), steel pipe is ductile, granular soil is particulate and clay soil is plastic. Structural performance limits are excessive deformations of the pipe; wall buckling, collapse, and leaks. Most performance limits are beyond elastic limit and yield stress.

Lastly, a brief discussion of the proper selection of protective linings and coatings which is critical to ensure the long-term protection of steel pipes is also included in this course. The linings and coatings referred to herein are believed to be the most reliable as proven in practice. Steel pipe lengths can be joined together in the field by many different configurations to effect rigid or flexible connections. The most commonly utilized joints include bell and spigot joints with rubber gaskets, welded lap joints, butt-strap joints, and mechanical couplings are also highlighted.

Learning Objectives

This course is intended to provide you with the following specific knowledge and skills:

• Learn the desirable requirements of buried, pressurized pipe that can be achieved by welded steel pipe;

• Learn important considerations that should not be overlooked by designers of buried steel pipe;

• Learn to perform structural analysis based on the interaction of pipe and soil;

• Learn the proper selection of protective linings and coatings;

• Learn the most commonly utilized joints for steel pipes.

Download the Course to review and begin earning your PDH credits.

Certificate of Completion

Upon passing a 40-question multiple-choice quiz, your certificate of completion will be available for immediate download. PDH credits are awarded once all course requirements, including the quiz, are successfully met.

Board Acceptance

We provide technical courses for PDH credits that meet Board requirements for Professional Engineers, Geologists and Land Surveyors. This course is guaranteed to be accepted for professional engineers in AK, AL, AR, DE, FL, GA, IA, IL, ID, IN, KS, KY, LA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY. Before purchasing this course, please confirm that your state Board is listed above.