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NXF UNS S30400 ASTM 304/JIS 304/EN 1.4301 OD DN15-1200 Thickness SCH10-XXS Stainless Steel BW Concentric or Eccentric Reducer
2026-09-01 18:18 NXF GROUP
4
Stainless steel 304 introduction
Stainless steel is an alloy steel based on iron and chromium, supplemented with alloying elements such as nickel, molybdenum, and manganese. The core principle is that chromium in the steel combines with oxygen to form a dense, stable chromium oxide passivation film on the material surface, isolating it from air and moisture and preventing the steel from rusting and corroding.304 stainless steel is an austenitic stainless steel and is the most widely used general-purpose stainless steel material.
BW Concentric or Eccentric Reducer Introduction
BW (Butt‑Weld) Reducer is a wrought butt‑weld pipe fitting manufactured per ASME B16.9. It connects two pipes of different nominal diameters and provides smooth internal transition for fluid flow, reducing turbulence and pressure loss inside pipeline system. It has two main types: Concentric Reducer for vertical pipelines and Eccentric Reducer for horizontal pipelines to avoid air pockets and pump cavitation. Both ends are beveled for full penetration butt‑welding with pipes, suitable for high‑pressure and high‑temperature fluid conveying.
BW Concentric or Eccentric Reducer Drawing
Stainless steel 304 Chemical composition and mechanical properties
BW Concentric or Eccentric Reducer Factory and
Product Pictures
Stainless steel 304 PMI spectrum test certificate
Customer visit to the factory video
BW Concentric or Eccentric Reducer Product Processing
1. Raw Material & Blanking:
Qualified seamless / welded pipe per ASTM standard is cut to required blank length. For welded blanks,weld beads are ground flush with base metal.
2. Local Heating & Hot Press Forming:
2. Local Heating & Hot Press Forming:
The blank is locally heated by medium‑frequency induction heating. Hydraulic press and dedicated dies perform neck‑down compression to form concentric or eccentric taper shape. Eccentric reducers require precise offset control for flat‑side dimension. Large‑size reducers can adopt plate rolling & welding process as alternative.
3. Trimming & Sizing:
3. Trimming & Sizing:
Cut off excess material at both ends, then calibrate roundness, concentricity / eccentricity and wall thickness to meet ASME B16.9 dimensional tolerance.
4. Heat Treatment:
4. Heat Treatment:
Perform normalizing / stress‑relief annealing according to material requirement. Remove forming residua stress, optimize mechanical properties and ductility.
5. End Machining & Bevel Preparation:
5. End Machining & Bevel Preparation:
Machine both ends to standard butt‑weld bevel as per ASME B16.25, guarantee fit‑up for site welding with pipes.
6. Surface Treatment:
6. Surface Treatment:
Shot blasting removes scale and oxide. Carbon steel parts can be coated with anti‑rust oil; stainless steel gets pickling & passivation.
7. Inspection & NDT Test:
7. Inspection & NDT Test:
Carry out dimensional check, visual inspection, wall‑thickness measurement, PMI material verification.Non‑destructive testing includes UT / MT / RT as project required to detect internal and surface defects.
8. Marking & Packing:
8. Marking & Packing:
Mark standard information (size, material, heat no., standard) on fitting surface. Protect bevel ends and pack for shipment.
Our NXF GROUP advantage as follow:
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in 1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work toensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Managementand Craftsmanship."
Our advantage:3S Service(Small Quantity/Short Time/Special Material).
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
8. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
8. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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