Standard Guide for the Production of Stainless Steel Eccentric Reducers: Parameters, Standards and Applications
Contents
- Introduction
- What is a stainless steel reducer?
- Features of stainless steel reducers
- Stainless steel reducer manufacturing standards
- ASME B16.9 eccentric reducer dimensions
- Stainless steel reducer material standards
- Weight calculation for stainless steel eccentric reducers
- Applications of ASME B16.9 butt-weld fittings
- Summary
Introduction
Stainless steel products are frequently used in industrial environments, and reducers are a frequent topic. Metleader exports a wide range of stainless steel products, including reducers from Vietnam, Indonesia, Kazakhstan, Nigeria, Iran, Egypt, Saudi Arabia, and other countries.
This demonstrates the importance and ubiquity of these pipe fittings in industry. This article details the production standards for stainless steel eccentric reducers, hoping to help you better select the right reducer.
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What is a stainless steel reducer?
Stainless steel eccentric reducer refers to a reducer whose centers are not on the same straight line. It is mainly used to connect two pipes of different diameters and is a common pipe connection accessory.
Features of stainless steel reducers
Stainless steel eccentric reducers offer corrosion resistance, high temperature resistance, and high pressure resistance, making them suitable for use in a variety of complex environments.
They can achieve smooth transitions between pipe diameters, reduce fluid resistance, and improve fluid delivery efficiency.
Proper use of these reducers not only alters the flow path but also saves material, unclogs pipelines, prevents blockages, and improves efficiency.
Stainless steel reducer manufacturing standards
The manufacturing of stainless steel eccentric reducers must comply with relevant national standards. Current standards include GB/T 12459, GB/T 13041, SH 3408, and ASME B16.9.
ASME B16.9 is the American standard for butt-weld pipe fittings, primarily specifying the detailed dimensions, specifications, and tolerances for various butt-weld fittings.
| Size Range | 3/4″ – 60″ / DN20 – 1500 |
| Thickness Schedule | SCH 10 – SCH 80, SCH 160, XXS |
| America Standard | ANSI / ASME B16.9 / MSS SP 43 |
| Stainless Steel | ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L |
ASME B16.9 Eccentric Reducer Dimensions
The ASME B16.9 standard specifies the detailed dimensions and specifications of eccentric reducers, including the diameter, wall thickness, length and other parameters of the large and small diameter ends.
| OD1 | OD2 | END TO END |
| NPS | NPS | H |
| 3/4 | 3/8 – 1/2 | 38 |
| 1 | 1/2 – 3/4 | 51 |
| 1 1/4 | 1/2 – 1 | 51 |
| 1 1/2 | 1/2 – 1 1/4 | 64 |
| 2 | 3/4 – 1 1/2 | 76 |
| 2 1/2 | 1 – 2 | 89 |
| 3 | 1 1/4 – 2 1/2 | 102 |
| 4 | 2 – 3 1/2 | 102 |
| 5 | 2 – 4 | 127 |
| 6 | 2 1/2 – 5 | 140 |
| 8 | 3 1/2 – 6 | 152 |
| 10 | 4 – 8 | 178 |
| 12 | 5 – 10 | 203 |
| 14 | 6 – 12 | 330 |
| 16 | 6 – 14 | 356 |
| 18 | 8 – 16 | 381 |
| 20 | 10 – 18 | 508 |
| 22 | 12 – 20 | 508 |
| 24 | 12 – 22 | 508 |
| 26 | 12 – 24 | 610 |
| 28 | 14 – 26 | 610 |
| 30 | 14 – 28 | 610 |
| 32 | 20 – 30 | 610 |
| 34 | 22 – 32 | 610 |
| 36 | 22 – 34 | 610 |
| 38 | 24 – 36 | 610 |
| 40 | 28 – 38 | 610 |
| 42 | 28 – 40 | 610 |
| 44 | 32 – 42 | 610 |
| 46 | 34 – 44 | 711 |
| 48 | 36 – 46 | 711 |
Tolerance ranges
The ASME B16.9 standard also specifies the tolerance range of stainless steel eccentric reducers to ensure the accuracy of their size and shape.
The tolerance range covers multiple aspects such as length, wall thickness, inner diameter and outer diameter, and manufacturers must ensure that the eccentric reducers they produce are within these tolerance ranges.
| TOLERANCES FOR BW REDUCER | ||||
| DN | NPS | OD | ID | H,F |
| 15-65 | 1/2-2-1/2 | +1.6 -0.8 | ±0.8 | ±2 |
| 80-90 | 3-3-1/2 | ±1.6 | ±1.6 | ±2 |
| 100 | 4 | ± 1 6 | ±1.6 | ±2 |
| 125-200 | 5-8 | +24 -1.6 | ±1.6 | ±2 |
| 250-450 | 10-18 | +4.0 -3.2 | ±3.2 | ±2 |
| 500-600 | 20-24 | +6.4 -4.8 | ±4.8 | ±2 |
| 650-750 | 26-30 | +6.4 -4.8 | ±4.8 | ±5 |
| 800-1200 | 32-48 | +6.4 -4.8 | ±4.8 | ±5 |
Stainless steel reducer material standards
Stainless steel eccentric reducers are made from high-quality stainless steel, offering excellent corrosion resistance, mechanical properties, and processability, meeting the requirements of diverse environments.
ASTM A403, a standard developed by the American Society for Testing and Materials (ASTM), specifically addresses the design, manufacture, and inspection of wrought or cast austenitic and ferritic stainless steel pipe fittings for pressure applications. Common stainless steel grades include 304, 316, and 316L.
Chemical composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A403 WP304 | MIN | 8.0 | 18.0 | ||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | ||
| ASTM A403 WP316 | MIN | 10.0 | 16.0 | 2.00 | |||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 |
Mechanical properties
| MATERIAL | ASTM A403 WP304 | ASTM A403 WP316 |
| T.S (MPA) | 515 min | 515 min |
| Y.S (MPA) | 205 min | 205 min |
| EL % | 28 min | 28 min |
Weight calculation for stainless steel eccentric reducers
Formula for calculating the weight of a stainless steel eccentric reducer: 0.02466 × t × [ (D+D1)/2-S] × H / 1000
| Large End Normal Size | SCH20 | SCH30 | STD | SCH40 | SCH60 | XS | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | XXS | |
| DN | NPS | ||||||||||||
| 20 25 32 | 3/4 1 1-1/4 | 0.06 0.12 0.16 | 0.07 0.14 0.19 | 0.07 0.14 0.19 | 0.09 0.18 0.25 | 0.09 0.18 0.25 | 0.12 0.24 0.32 | 0.15 0.31 0.45 | |||||
| 40 50 65 | 1-1/2 2 2-1/2 | 0.25 0.37 0.79 | 0.29 0.46 0.85 | 0.29 0.46 0.85 | 0.38 0.63 1.12 | 0.38 0.63 1.12 | 0.51 0.93 1.46 | 0.70 1.20 2.00 | |||||
| 80 90 100 | 3 3-1/2 4 | 0.97 1.28 1.45 | 1.11 1.52 1.81 | 1.11 1.52 1.81 | 1.50 2.09 2.51 | 1.50 2.09 2.51 | 3.18 | 2.09 3.76 | 2.71 4.60 | ||||
| 125 150 200 | 5 6 8 | 5.57 | 6.16 | 3.04 4.35 7.12 | 3.04 4.35 7.12 | 8.88 | 4.33 6.55 10.8 | 4.33 6.55 10.8 | 12.7 | 5.63 8.35 15.1 | 16.9 | 6.86 10.4 18.6 | 8.02 12.2 18.0 |
| 250 300 350 | 10 12 14 | 8.18 11.1 24.6 | 9.99 14.6 29.5 | 11.8 16.5 29.6 | 11.8 17.8 34.3 | 16.0 24.3 46.0 | 16.0 21.8 39.0 | 18.8 29.5 57.4 | 22.5 35.7 70.8 | 26.0 41.7 81.5 | 30.4 46.5 92.0 | 33.7 53.3 102 | 30.4 41.7 |
| 400 450 500 | 16 18 20 | 30.5 36.8 65.5 | 36.5 51.3 86.7 | 36.6 44.1 65.5 | 48.3 65.3 102 | 62.7 86.2 138 | 48.3 58.3 86.7 | 79.7 107 174 | 96.2 130 213 | 112 152 247 | 130 171 284 | 143 193 316 | |
| 550 600 650 | 22 24 26 | 72.2 78.9 136 | 95.6 117 | 72.2 78.9 103 | 143 | 164 199 | 95.6 105 136 | 209 247 | 252 306 | 294 358 | 336 402 | 376 452 | |
| 700 750 800 | 28 30 32 | 147 157 168 | 183 196 209 | 111 119 127 | 230 | 147 158 168 | |||||||
| 850 900 950 | 34 36 38 | 179 189 | 223 236 | 135 143 151 | 245 282 | 179 190 200 | |||||||
| 1000 1050 1100 | 40 42 44 | 159 167 175 | 211 222 232 | ||||||||||
| 1150 1200 | 46 48 | 213 222 | 283 296 | ||||||||||
Applications of ASME B16.9 butt-weld fittings
Diverse Materials
ASME B16.9 butt-weld pipe fittings can be manufactured from a variety of materials, including carbon steel, cryogenic steel, pipeline steel, alloy steel, stainless steel, and duplex stainless steel, adapting to piping systems in diverse environments.
Wide Application Range
Butt-weld pipe fittings offer a wide range of sizes and wall thicknesses, adapting to piping systems with varying diameters and pressure requirements.
High Safety Factor
Butt-weld pipe fittings connect two pipes or equipment through welding, providing excellent sealing performance and ensuring pipeline safety and reliability. The sealing and strength of butt-weld connections are guaranteed under harsh conditions such as high temperature and high pressure.
Durability
Butt-weld pipe fittings offer superior strength compared to other connection methods, capable of withstanding greater tension, pressure, and torque.
Easy Installation
Butt-weld pipe fittings require no special tools or skills for installation, making the connection simple and easy to construct.
High Cost-Effectiveness
Butt-weld pipe fittings are generally made of steel pipe, resulting in a relatively simple manufacturing process and low cost, effectively reducing the cost of pipeline projects.
Summary
Butt-weld pipe fittings are a crucial component of pipeline accessories. They not only connect pipes but also change flow direction, reduce fluid resistance, and regulate flow.
Therefore, they are widely used in industries such as chemical, food, petroleum, natural gas, and biopharmaceuticals.
The above introduction provides a clearer understanding of the performance parameters and characteristics of stainless steel eccentric reducers, which can help us better select the appropriate reducer.
