Views: 4 Author: Site Editor Publish Time: 2025-05-21 Origin: Site
Stainless steel elbows are pipe fittings used to connect two sections of pipe or tubing, changing the direction of the pipeline and plumbing system. Common angles include 45, 90, and 180 degrees. Due to stainless steel's excellent corrosion resistance, high strength, and durability, they have wide applications in industries such as petrochemical, chemical, pharmaceutical, and food processing.
Because of stainless steel's exceptional corrosion resistance, stainless steel elbow manufacturers can ensure the structural integrity of engineered designs. Chromium-containing stainless steel also combines mechanical strength with high ductility, making components easy to process and fabricate, meeting the needs of architects and structural designers. Stainless steel stamped elbows won't cause corrosion, pitting, rusting, or wear, and among construction metal materials, stainless steel remains one of the high-strength options.
ZIZI offers a variety of styles and sizes of stainless steel elbows. Elbow sizes range from 1/2 inch to 80 inches, with wall thicknesses covering SCH 10, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS, all conforming to ASME B16.9 standards.
1. Excellent Corrosion Resistance:
This is the core feature of stainless steel. It contains chromium, which forms a dense, passive chromium oxide film on the surface. This film has strong oxidation resistance and effectively resists the erosion of various corrosive media.
2. High Strength and Superior Mechanical Properties:
Stainless steel possesses high tensile strength, yield strength, and hardness, enabling it to withstand high fluid pressures and external loads. It also exhibits good toughness and ductility, allowing it to absorb impact and vibration to some extent without easily fracturing.
3. High and Low Temperature Resistance:
Stainless steel maintains good strength and oxidation resistance in high-temperature environments, resisting creep or thermal deformation, making it suitable for high-temperature fluid conveying systems.
4. Good Weldability and Workability:
Stainless steel elbows, especially those made from austenitic stainless steel, offer good weldability. They are easy to weld to other stainless steel pipes or equipment, forming sealed and robust systems.
5. Wear Resistance:
Stainless steel has a certain degree of wear resistance, allowing it to resist the erosion and abrasion caused by solid particles in fluids to some extent, thereby extending the service life of pipeline systems.
Size Range | 1/2"- 80" / DN15 - 2000 |
Thickness Schedule | SCH 10, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS |
Standard | ANSI / ASME B16.9 |
Stainless Steel Grades | ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L |
Stainless steel elbows are manufactured from various grades of stainless steel, each offering a unique combination of properties to suit specific applications. The choice of material is critical and depends heavily on the intended service conditions, including temperature, pressure, corrosive environment, and mechanical stress.
The commonly used materials for stainless steel butt welding elbows are 304 and 316, which are widely used in industrial piping systems. 304 stainless steel has good corrosion resistance and processing performance, and is suitable for conventional environments such as water treatment and food processing; while 316 stainless steel has better performance in resistance to chloride ion corrosion and high temperature and high pressure environments due to the addition of molybdenum, and is widely used in the chemical, marine and pharmaceutical industries.
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 WP304L | MIN | 8.00 | 18.00 | ||||||
MAX | 0.03 | 2.00 | 0.05 | 0.03 | 1.00 | 12.00 | 20.00 | ||
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 | |
ASTM A403 WP316L | MIN | 10.00 | 16.00 | ||||||
MAX | 0.03 | 2.00 | 0.05 | 0.03 | 1.00 | 14.00 | 18.00 |
MATERIAL | ASTM A403 WP304 | ASTM A403 WP304L | ASTM A403 WP316 | ASTM A403 WP316L |
T.S (MPA) | 515 min | 485 min | 515 min | 485 min |
Y.S (MPA) | 205 min | 170 min | 205 min | 170 min |
EL % | 28 min | 28 min | 28 min | 28 min |
Seamless : Seamless stainless steel elbows are produced from a continuous piece of pipe or tube, without any welded seams. These are typically manufactured using processes like hot forming (hot pushing) or cold forming (cold pushing). The absence of a seam results in a higher integrity product, often preferred for high-pressure and critical applications where weld defects are unacceptable. While their manufacturing process can be more time-consuming and resource-intensive, they offer superior strength, uniform structure, and better resistance to corrosion and wear due to their consistent material properties throughout. Their appearance is generally more aesthetically pleasing as there are no visible joint lines.
Welded : Welded stainless steel elbows are made of stainless steel sheets or strips through rolling and welding. They have low manufacturing costs and short processing cycles, and are suitable for general industry or low-pressure conveying systems. Although the weld is a relatively weak point, with the improvement of welding technology and detection methods, welded elbows can be used reliably in many occasions. There may be obvious connection gaps in the appearance of welded stainless steel products, which may affect their aesthetics. However, due to the flexibility and adjustability of the manufacturing process, more complex shapes and structures can be produced.
90 Degree Elbow :
Changes the direction of flow by exactly 90 degrees, forming a right angle. This is the most common type of elbow.
45 Degree Elbow:
Changes the direction of flow by 45 degrees, offering a gentler turn than a 90-degree elbow.Typically available in long radius. They cause less turbulence and pressure drop compared to 90-degree elbows.
180 Degree Elbow :
Changes the flow direction by 180 degrees.Often used in heating coils, process loops, or compact piping designs.
Stainless steel elbows can be classified based on their radius of curvature into long radius elbows and short radius elbows.
Long Radius Elbow: The radius of curvature is 1.5 times the outer diameter of the pipe, i.e., R = 1.5D.
Short Radius Elbow: The radius of curvature is equal to the outer diameter of the pipe, i.e., R = D.
In these formulas:
D represents the diameter of the elbow (outer diameter of the pipe).
R represents the radius of curvature.
This classification helps in selecting the appropriate elbow based on flow requirements, space constraints, and pressure loss considerations.
Nominal Size | Outside Diameter at Bevel | Center to End | Center to Center | Back to Face | |||||
90° Elbows | 45° Elbows |
| |||||||
DN | NPS | OD | A | B | O | K | |||
LR | SR | LR | LR | SR | LR | SR | |||
15 | 1/2 | 21.3 | 38 | 16 | 76 | 48 | |||
20 | 3/4 | 26.7 | 38 | 19 | 76 | 51 | |||
25 | 1 | 33.4 | 38 | 25 | 22 | 76 | 51 | 56 | 41 |
32 | 1 1/4 | 42.2 | 48 | 32 | 25 | 95 | 64 | 70 | 52 |
40 | 1 1/2 | 48.3 | 57 | 38 | 29 | 114 | 76 | 83 | 62 |
50 | 2 | 60.3 | 76 | 51 | 35 | 152 | 102 | 106 | 81 |
65 | 2 1/2 | 73.0 | 95 | 64 | 44 | 190 | 127 | 132 | 100 |
80 | 3 | 88.9 | 114 | 76 | 51 | 229 | 152 | 159 | 121 |
90 | 3 1/2 | 101.6 | 133 | 4、89 | 57 | 267 | 178 | 184 | 140 |
100 | 4 | 114.3 | 152 | 102 | 64 | 305 | 203 | 210 | 159 |
125 | 5 | 141.3 | 190 | 127 | 79 | 381 | 254 | 262 | 197 |
150 | 6 | 168.3 | 229 | 152 | 95 | 457 | 305 | 313 | 237 |
200 | 8 | 219.1 | 305 | 203 | 127 | 610 | 406 | 414 | 313 |
250 | 10 | 273.0 | 381 | 254 | 159 |
| 508 | 518 | 391 |
300 | 12 | 323.8 | 457 | 305 | 190 | 914 | 609 | 619 | 467 |
350 | 14 | 355.6 | 533 | 356 | 222 | 1067 | 711 | 711 | 533 |
400 | 16 | 406.4 | 610 | 406 | 254 | 1219 | 813 | 813 | 610 |
450 | 18 | 457.0 | 686 | 457 | 286 | 1372 | 914 | 914 | 686 |
500 | 20 | 508.0 | 762 | 508 | 318 | 1524 | 1016 | 1016 | 762 |
550 | 22 | 559.0 | 838 | 559 | 343 | 1676 | 1118 | 1118 | 838 |
600 | 24 | 610.0 | 914 | 610 | 381 | 1829 | 1219 | 1219 | 914 |
650 | 26 | 660.0 | 991 | 660 | 406 | ||||
700 | 28 | 711.0 | 1067 | 711 | 438 | ||||
750 | 30 | 762.0 | 1143 | 762 | 470 | ||||
800 | 32 | 813.0 | 1219 | 813 | 502 | ||||
850 | 34 | 864.0 | 1295 | 864 | 533 | ||||
900 | 36 | 914.0 | 1372 | 914 | 565 | ||||
950 | 38 | 965.0 | 1448 | 965 | 600 | ||||
1000 | 40 | 1016.0 | 1524 | 1016 | 632 | ||||
1050 | 42 | 1067.0 | 1600 | 1067 | 660 | ||||
1100 | 44 | 1118.0 | 1676 | 1118 | 695 | ||||
1150 | 46 | 1168.0 | 1753 | 1168 | 727 | ||||
1200 | 48 | 1219.0 | 1829 | 1219 | 759 | ||||
Nominal Size | All Fittings | 45°&90° Elbows |
| ||||
DN | NPS | OD 3) 4) | ID 3) | A B C M |
| K | U |
15-65 | 1/2 -21/2 | +1.6 | ± 0.8 | ± 2 | ± 6 | ± 6 | ± 1 |
80-90 | 3-31/2 | ± 1.6 | ± 1.6 | ± 2 | ± 6 | ± 6 | ± 1 |
100 | 4 | ± 1.6 | ± 1.6 | ± 2 | ± 6 | ± 6 | ± 1 |
125-200 | 5-8 | +2.4 | ± 1.6 | ± 2 | ± 6 | ± 6 | ± 1 |
250-450 | 10-18 | +4.0 | ± 3.2 | ± 2 | ± 10 | ± 6 | ± 2 |
500-600 | 20-24 | +6.4 | ± 4.8 | ± 2 | ± 10 | ± 6 | ± 2 |
650-750 | 26-30 | +6.4 | ± 4.8 | ± 3 | --- | --- | --- |
800-1200 | 32-48 | +6.4 | ± 4.8 | ± 5 | --- | --- | --- |
1300-1500 | 52-60 | +6.4 | ± 4.8 | ± 5 | --- | --- | --- |
1600-1700 | 64-68 | +6.4 | ± 4.8 | ± 5 | --- | --- | --- |
1800-2000 | 72-80 | +6.4 | ± 4.8 | ± 5 | --- | --- | --- |
- Ensure that the connection between the pipe and the elbow is smooth, free of cracks and burrs, to avoid affecting the sealing performance.
- When performing butt welding on stainless steel elbows, strictly follow the specified procedures to ensure the quality of the weld.
- Before installation, the elbow must be thoroughly cleaned to prevent impurities from entering the pipeline and affecting its operation.
-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)
-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )
-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)
-Round bar , Billet (ASTM A276, ASTM A479)
- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)
-Bolting, Nuts（ASTM A193, A194, A320）
We Export Stainless Steel elbow to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc
1. What is an advantage of using two 45 degree elbows instead of one 90 degree elbow?
Using two 45-degree elbows instead of one 90-degree elbow offers the primary advantage of reducing pressure drop and turbulence in the fluid flow. By creating a more gradual change in direction, this configuration minimizes friction and energy loss, leading to more efficient fluid transport and potentially less wear on the piping system over time.
2. What are the different types of elbows in piping?
Stainless steel elbows can be divided into different types according to the angle of the elbow, the common ones are 90 degree elbows, 45 degree elbows and 180 degree elbows, etc. According to the bending radius of the elbow, it can be divided into long radius elbows and short radius elbows. In addition, according to the connection method, it can also be divided into butt welding elbows, threaded elbows and socket elbows, etc. Different types of stainless steel elbows play different roles in pipeline engineering, so when choosing standard sizes, it is necessary to make reasonable choices according to specific circumstances.
