Concentric Butt‑Weld Reducer
Our seamless concentric butt weld reducer is hot‑formed pipe fitting for co‑axial pipe‑size reduction. Manufactured strictly per ASME B16.9 and IS 1239 standards, all items maintain full nominal dimension without minus tolerance, widely used for vertical pipelines in petroleum, chemical, power‑plant and water‑supply projects.
Overview
Concentric Butt‑Weld Reducer is a seamless hot‑spun butt‑weld pipe fitting for connecting pipes with different diameters. Its central axes of two ends coincide perfectly, which is the ideal choice for vertical pipeline diameter transition.
We produce concentric reducers from carbon steel A234 WPB and stainless‑steel A403 WP304 / WP316L by integral hot‑forming process. The wall‑thickness is uniform and inner surface is smooth to reduce fluid resistance. We strictly control outer diameter, inner diameter and wall‑thickness, ensuring zero minus tolerance without thin‑wall cutting‑corners. Custom reducing ratios, wall thickness and overall lengths are available to match various project requirements.
Core Key Features
- Integral seamless hot‑spun forming, uniform wall‑thickness, outstanding pressure‑bearing capability.
- Concentric co‑axial design, perfect alignment for vertical pipeline installation.
- Butt‑weld ends for full‑penetration welding, stable sealing performance under high‑pressure conditions.
- Available raw materials: Carbon Steel A234 WPB; Stainless‑Steel A403 WP304 / WP316L.
- Compliant with global standards: ASME B16.9, ASTM A234, ASTM A403, IS 1239.
- Full‑size range: DN15‑DN1200 (1/2″‑48″), all reducing ratios are customizable.
- Zero minus tolerance on OD, ID and wall‑thickness, strictly follow full‑standard nominal size.
- Pass UT ultrasonic inspection and hydro‑static test before shipment, complete MTC material certificates provided.
Technical Specification
| Item | Technical Parameter |
|---|---|
| Product Name | Concentric Butt‑Weld Reducer |
| Connection Type | Butt‑Weld (BW) |
| Production Craft | Seamless Hot Spinning Forming |
| Executive Standard | ASME B16.9, ASTM A234, ASTM A403, IS 1239 |
| Available Materials | Carbon Steel A234 WPB; Stainless‑Steel A403 WP304 / WP316L |
| Size Range | DN15 ~ DN1200 (1/2″ ~ 48″) |
| Wall Schedule | Sch40, Sch80, Sch160, XXS, Custom wall thickness |
| Structure Feature | Concentric co‑axial design for vertical pipeline |
| Dimensional Tolerance | Full‑standard nominal size, zero minus tolerance |
| Inspection Items | UT Ultrasonic Test, Hydrostatic Test, Full‑dimension Inspection |
| Surface Treatment | Black anti‑rust paint / Sandblasting (Carbon Steel); Pickling & Passivation (Stainless‑Steel) |
Application
- Petroleum and natural‑gas vertical riser pipelines
- Chemical‑plant vertical process pipelines
- Thermal power‑station steam and condensate vertical piping
- Water‑supply and sewage vertical pipeline engineering
- Food and pharmaceutical stainless‑steel clean pipelines
- Indian IS‑1239 standard industrial and municipal pipeline projects
- Off‑shore platform vertical fluid‑conveying pipelines
Why Choose Our Concentric Butt‑Weld Reducer
- Factory direct manufacture, large stock of regular sizes with competitive ex‑works price.
- All reducers are produced with full‑standard dimensions and zero minus tolerance, no thin‑wall cost‑cutting.
- Custom reducing ratio, wall‑thickness and surface treatment acceptable according to customer drawings.
- Strict whole‑process quality inspection, complete test documents for export customs clearance.
- Fast delivery within 7‑15 working days for standard in‑stock items.
- Export‑grade wooden‑case packaging for anti‑rust and anti‑collision during long‑sea transportation.
FAQ
Q1: When should we choose concentric reducer vs eccentric reducer?
Q2: Do your concentric reducers have minus tolerance on wall‑thickness?
Q3: Can you manufacture reducers complying with India IS‑1239 standard?
Q4: Can you supply stainless‑steel concentric reducers?
