Large Diameter Stainless Steel Reducer 1/2 to 72 Inch Butt Weld

This large diameter stainless steel reducer is manufactured to cover the widest size range in the industry, from 1/2 inch up to 72 inch, giving engineers a single reliable source for both small-bore and heavy-wall large-bore piping transitions. Fabricated from premium stainless steel plate or seamless tube according to the required diameter, each reducer is formed, heat treated and machined to a consistent wall thickness and bevel, then welded to the pipeline by butt welding. The ability to supply this stainless steel reducer in very large diameters makes it especially valuable for cooling water lines, desalination headers, process plants and municipal water projects where oversized pipes must be connected safely and economically.

For large diameters, we form the reducer from rolled and welded stainless steel plate, then perform full penetration welding, post-weld heat treatment and 100 percent visual inspection to eliminate surface defects. Dimensional checks cover the large and small end diameters, wall thickness, concentricity and the bevel angle, while radiography or ultrasonic testing is available for the longitudinal weld on request. This approach lets us deliver a large diameter stainless steel reducer that meets the same dimensional standards as smaller seamless fittings but at a competitive cost for big-bore pipelines.

Product Specifications

Key Advantages & Applications

• Full size coverage from 1/2 inch to 72 inch reduces multi-supplier sourcing complexity.
• Large diameter stainless steel reducer is formed with uniform wall thickness for reliability.
• Both seamless and welded construction options to optimise cost for large sizes.
• Suitable for cooling water systems, desalination plants, chemical pipelines and power stations.
• Custom dimensions and schedules manufactured to project specifications on request.
• Weld radiography and hydrostatic testing available for critical large-bore applications.

Frequently Asked Questions

Q: What is the maximum diameter you can supply?
A: We can manufacture this stainless steel reducer up to 72 inch (DN1800), and even larger sizes are negotiable for special projects.

Q: Are large diameter reducers seamless or welded?
A: Small sizes are seamless while large diameters are typically welded from plate; both meet the same dimensional standards.

Q: What wall thickness schedules are available?
A: We supply Sch5S through Sch160 and custom wall thickness according to your design pressure.

Q: Can you provide third-party inspection?
A: Yes, SGS, BV, TUV and other third-party inspections can be arranged before shipment.

Q: How is the longitudinal weld tested on large reducers?
A: Radiography or ultrasonic testing is available on request to verify weld integrity for large diameter fittings.

Ordering, Packing & Delivery

Please confirm the required material grade, end diameters, wall thickness schedule, applicable standard and quantity when placing your enquiry, and our team will respond with a detailed quotation, production lead time and available inspection options. Each fitting is cleaned and dried, then packed into reinforced plywood cases or pallets with clear shipping marks to prevent damage during transit. We support sea freight, air freight and express courier delivery, and provide packing lists, material certificates and other export documents before dispatch to keep your customs clearance smooth.