1. What quality inspection items are there for ERW steel pipes?
The quality inspection of ERW steel pipes includes multiple items to ensure product qualification, mainly including: appearance inspection (checking the surface of the pipe for defects such as cracks, scratches, and burrs, and checking the weld seam for unevenness, porosity, and slag inclusion); dimensional inspection (measuring the outer diameter, wall thickness, length, and roundness of the pipe to meet the standard requirements); weld quality inspection (using non-destructive testing methods such as ultrasonic testing, X-ray testing, and magnetic particle testing to check for internal defects in the weld); mechanical performance testing (tensile test, bending test, impact test to verify the strength, toughness, and ductility of the pipe); and corrosion resistance testing (for anti-corrosion treated pipes, testing the adhesion and corrosion resistance of the coating).
2. Can ERW steel pipes be used for structural purposes?
Yes, ERW steel pipes are widely used in structural engineering, such as building frames, scaffolding, bridges, and steel structures. Because ERW steel pipes have high mechanical strength, good rigidity, and light weight, they can reduce the overall weight of the structure while ensuring the bearing capacity. In addition, ERW pipes can be easily connected by welding or threading, which improves the construction efficiency. Common structural ERW pipes include square ERW pipes, rectangular ERW pipes, and circular ERW pipes.
3. What is the minimum order quantity (MOQ) for ERW steel pipes?
The minimum order quantity (MOQ) for ERW steel pipes depends on the specifications, materials, and customer requirements. For standard specifications (such as outer diameter 15-108mm, wall thickness 1.5-6mm), the MOQ is usually 10 tons; for non-standard specifications (customized diameter, wall thickness, or length), the MOQ may be 20 tons or more. For small-batch trial orders, we can also negotiate appropriately to meet the customer's trial needs and help customers reduce the initial procurement risk.
4. How are ERW steel pipes packaged for export?
For export, ERW steel pipes are packaged in accordance with international shipping standards to prevent damage during transportation. Common packaging methods include: bundling (using steel strips to bundle the pipes into bundles, each bundle weighs 1-2 tons, and the number of pipes per bundle depends on the diameter); plastic film wrapping (wrapping the surface of the pipe bundle with plastic film to prevent moisture and rust); wooden pallets (placing the pipe bundles on wooden pallets for easy loading, unloading, and transportation); and seaworthy packaging (for long-distance marine transportation, adding waterproof paper and wooden boxes to enhance moisture resistance and impact resistance). We can also adjust the packaging method according to the customer's special requirements (such as labeled packaging, customized packaging marks).
5. What is the lead time for ERW steel pipe orders?
The lead time for ERW steel pipe orders depends on the order quantity, specifications, and production schedule. For standard specifications and small-batch orders (10-50 tons), the lead time is usually 7-15 working days; for large-batch orders (50-200 tons), the lead time is 15-30 working days; for non-standard customized orders (special diameter, wall thickness, or anti-corrosion treatment), the lead time may be 30-45 working days. We will formulate a reasonable production plan according to the customer's order, and timely feedback the production progress to ensure on-time delivery.
