Q1: What is Professional Supplier Large Diameter spiral Steel Pipe used for?

Professional Supplier Large Diameter spiral Steel Pipe is widely used in construction, water supply systems, oil and gas pipelines, structural frameworks, scaffolding, and industrial fluid transportation. Sino East Steel provides high-quality steel products that meet international standards including ASTM, BS, JIS, and GB.

Q2: What standards does Professional Supplier Large Diameter spiral Steel Pipe comply with?

Our steel products products comply with ASTM A53, ASTM A500, BS1387, BS1139, JIS G3444, API 5L, and GB/T 3091 standards. Custom standards are available upon request. All products come with mill test certificates (MTC).

Q3: What is the minimum order quantity (MOQ) for steel products?

Our standard MOQ is 5-10 tons per specification. For trial orders, we accept 1-2 tons with slightly higher unit pricing. Contact our sales team for a customized quotation based on your requirements.

Q4: How long does delivery take for steel products orders?

Standard delivery time is 15-25 days after order confirmation. For urgent orders, we offer express production within 7-10 days. Shipping time depends on destination — typically 7-30 days by sea freight. Sino East Steel ships to over 50 countries worldwide.

Q5: How does Sino East Steel ensure product quality?

We implement strict quality control at every stage: raw material inspection, in-process testing, and final inspection. Each shipment includes Mill Test Certificates (MTC) per EN 10204 3.1. Third-party inspection by SGS, BV, or Intertek is available upon request.

Q6: What payment methods are accepted?

We accept T/T (30% deposit, 70% against B/L copy), L/C at sight, and Western Union. For long-term partners, we offer flexible payment terms including D/P and OA. Competitive factory-direct pricing available for all products.