1. Standard definitions and application scenarios
GB/T8163: Mainly used for general and mechanical structures, suitable for normal temperature fluid transport, such as water, oil and gas.
GB3087: designed for boilers and other high temperature applications, with higher mechanical properties.
2. Mechanical properties
GB/T8163: tensile strength range is 410~530 MPa.
GB3087: Tensile strength range is 410~550 MPa, applicable to higher pressure and temperature conditions.
3. Inspection items and quality requirements
GB/T8163:
Surface defects such as cracks, folding, rolling, scarring and delamination are allowed.
Hydraulic test can be replaced by eddy current flaw, magnetic leakage flaw and ultrasonic flaw.
Ultrasonic flaw detection is not required.
GB3087:
Bending test and low times inspection are mandatory.
Flare test and surface quality have higher indexes.
High temperature tensile test is optional.
4. Limitations on Application and Cost
GB/T8163: Applicable to working conditions where the pressure is not greater than 1.6MPa and the temperature is not greater than 350℃.
GB3087: Relatively high cost due to higher quality and performance requirements.