Use a threaded flange when the pipe material, service or job-site conditions make welding difficult or dangerous — such as stainless steel service where post-weld heat treatment is impractical, low-pressure utility lines, or hazardous-area installations where hot work is not permitted. For high-pressure, high-temperature or critical-service lines, prefer a weld neck flange.

Standard supply covers ASME B16.5 Class 150, 300 and 600. On request we can produce Class 900, 1500 and even 2500 threaded flanges from high-strength alloy steels such as A182 F11 / F22 / F91.

Yes — full OEM/ODM service. Send us your drawing, sample or detailed specification and our engineering team will quote within 24 hours. We routinely produce to DIN, GOST, JIS and customer-specific standards.

Standard threads are NPT per ASME B1.20.1. BSP and BSPT per ISO 228 / ISO 7 are also available. Special threads (metric, ACME, API line pipe) can be machined on request.

Standard stock sizes in carbon steel ship within 7 days. Custom orders typically take 20–35 days depending on size, material and quantity. We also keep fast-track slots for urgent projects.

Each shipment includes EN 10204 3.1 / 3.2 material certificate, dimensional inspection report, NDT report (if requested), commercial invoice, packing list, B/L and any required origin or conformity certificates (CE, GOST, FORM-E, etc.).