What is Casing and Tubing?
Tubing naturally has a smaller diameter than casing pipe, except for the 4 1/2-inch diameter. An outer diameter of 114.3 mm (4 1/2 inches) is considered a threshold and can be either casing or tubing....
Surface Treatment Method and Function of Stainless Steel Pipe
The surface of the stainless steel pipe will change differently in different environments. Knowing the influence of the use environment on the stainless steel pipe can choose the right model, otherwis...
Testing Methods of Oil Casing Manufacturers
What are the detection methods of oil casing pipe ? Let's take a brief look:
1. Ultrasonic testing
When ultrasonic waves are spread in the tested raw materials, the acoustic characteristics of t...
45# Seamless Pipe Characteristics
45 refers to the carbon content in this material, which is about 450. This material is also more common than other superior carbon steels.
Steel 45: average carbon content is 0.42-0.50%, average sili...
Essentials of Technical Operations for Oil Casing Workers
Points for workers' technical operations:
1. Parameter setting: Set the test pressure value and voltage stabilization time according to the specifications of the petroleum pipe to be tested, the steel...
Comparison of ERW Welded Pipe and Seamless Steel Pipe (tested by PetroChina Pipe Institute)
1. Outer diameter tolerance
ERW steel pipe: It is cold-formed and sizing is completed by reducing the diameter by 0.6%. The process temperature is basically constant at room temperature. Therefore, th...
