1. Q: What non-destructive testing is common for A106B?
A: Hydrostatic testing is mandatory for each A106B pipe. Non-destructive electric tests (like eddy current or ultrasonic) may also be specified.
2. Q: Is impact testing required for Q235B?
A: For the "B" grade, impact testing at room temperature (20°C) is required per GB/T 700. The minimum Charpy V-notch impact energy is 27J.
3. Q: Is impact testing required for A106B?
A: Not routinely. ASTM A106 states that impact testing is not required unless specified in the purchase order.
4. Q: What is the standard hydrostatic test pressure for A106B?
A: The test pressure is calculated as per the formula in the standard (based on wall thickness, diameter, and a stress equal to 60% of yield strength) but must not exceed a certain stress at the mill's discretion. Each pipe is tested.
5. Q: Does Q235B pipe undergo hydrostatic testing?
A: For fluid transport pipes (like GB/T 3091), hydrostatic testing is a standard requirement. The test pressure is specified in the relevant product standard.
