The weld grade requirements for internal and external epoxy powder-coated straight seam steel pipes are generally related to the pipe use and working environment. There will be corresponding requirements in engineering design and standard specifications.

For example, for pipelines transporting corrosive media such as oil, gas, and chemicals, the welds are generally required to pass X-ray or ultrasonic testing, and relevant inspections and monitoring are required. For some general water supply and drainage pipes, etc., the welding grade requirements are relatively low, and only the sealing and durability of the pipes need to be ensured. During construction, welding processes that comply with national standards or industry standards are generally used according to engineering design and specification requirements, and relevant inspections and records are conducted to ensure that the weld quality of plastic-coated steel pipes meets the requirements.

Introduction to the use of internal and external epoxy powder coated straight seam steel pipes
The inner and outer epoxy powder-coated straight seam steel pipe is a pipe material with excellent anti-corrosion properties. It consists of two inner and outer layers of plastic coating and a steel pipe matrix. The inner plastic coating is made of food-grade polyethylene (PE), and the outer coating is made of highly weather-resistant polyethylene (PE) or polypropylene (PP). The plastic-coated steel pipe has the characteristics of lightweight, easy to install, low cost, and long service life.

Internal and external epoxy powder-coated straight seam steel pipes is suitable for urban water supply, chemical pipelines, mining transportation, and other fields. They are widely used in tap water, hot water, oil transportation, fertilizers, gases, chemical raw materials, food industry, vacuum condensation, aerospace, and other fields.