What is the difference between EFW and ERW pipes?
EFW (electrofusion welded) pipes use an electric arc to fuse steel plates together, while ERW (resistance welded) pipes use resistance heating to fuse the edges of steel plates together. EFW pipes are typically used for high-pressure applications, while ERW pipes are used for medium- and low-pressure applications.
What are the common grades of ASTM A672 pipes?
Common grades of ASTM A672 pipes include B60, C65, and C70. These grades are classified based on the chemical composition and mechanical properties of the steel.
What is the maximum operating temperature of ASTM A672 pipes?
ASTM A672 pipes are designed for medium-temperature environments, typically up to 400°C (752°F), with the specific temperature depending on the pipe grade and specifications.
How can the quality of ASTM A672 steel pipes be guaranteed?
Quality assurance for ASTM A672 steel pipes is achieved through non-destructive testing (NDT) methods, such as ultrasonic testing, radiographic testing, and magnetic particle testing, as well as hydrostatic testing, to verify the pipes' ability to withstand internal pressure.
Which industries use ASTM A672 EFW steel pipes?
ASTM A672 EFW steel pipes are widely used in industries such as power generation, petrochemicals, oil and gas, and water transportation due to their ability to withstand high pressure and moderate temperatures.
