Q: What is a "guided bend test" for?
A: To evaluate the ductility and soundness of the weld by bending a specimen cut across the seam around a mandrel.
Q: Why might ERW pipe be chosen over seamless for certain applications?
A: For lower pressure/cost applications, precise dimensions, thinner walls, and availability in long lengths. It's often more economical.
Q: Where are large-diameter SAW pipes predominantly used?
A: In cross-country oil and gas transmission pipelines, water mains, and piling.
Q: What is a key advantage of spiral welded pipe?
A: It can produce large diameters from a narrower strip and offers flexibility in diameter using the same strip width by changing the forming angle.
Q: When would you specify a "cured" or heat-treated pipe?
A: For critical services (high pressure, low temperature, sour service) where stress relief and improved toughness are required.
