Views: 13 Author: Site Editor Publish Time: 2025-04-29 Origin: Site
Stainless steel pipe fittings are crucial components used to connect, redirect, control, and terminate the flow within piping systems made of stainless steel. Their inherent properties, such as corrosion resistance, durability, strength, and ease of cleaning, make them indispensable across a wide range of industries.
ZIZI is a company specializing in the production and processing of pipes and fittings. We specialize in the production of austenitic stainless steel, nickel-based alloys, duplex steel and marine pipes. The main materials include 304, 304L, 316L, 310S, 321/H, 347/H, 904L, 254SMo, S31803, S32205, S32750, N02200, N04400, N06600, N06625, N08800, N08825, N10276, etc. And the material and size can be customized according to customer requirements. The pipes and pipe fittings we produce are mainly used in chemical, petroleum, natural gas, water conservancy, electric power, marine engineering and other fields. The products mainly include seamless pipes, welded pipes, butt-welded pipe fittings, high-pressure forged pipe fittings and flanges of various sizes. The materials include carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel, base alloy, etc. We provide high-quality products and very competitive prices to customers from all walks of life around the world. Most of our products are exported to Europe, the United States, Russia, Australia, Southeast Asia, South Africa and other regions. Welcome to contact us.
Stainless steel butt weld pipe fittings are components used to connect, branch, or change the direction of piping systems by welding them directly to the pipe.
They offer high strength, seamless flow, and excellent corrosion resistance, making them ideal for high-pressure, high-temperature, and corrosive environments.
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, MSS SP 43, JIS B2311/2312/2313, EN10253 |
Stainless Steel Grades | ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L |
Elbows (45°, 90°, 180° — long radius or short radius)
Tees (Equal Tees, Reducing Tees)
Reducers (Concentric Reducers, Eccentric Reducers)
Caps (Pipe End Caps)
Stub Ends (for Lap Joint Flange Connections)
Crosses (Four-way pipe connections)
CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu |
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 | |||
ASTM A403 WP904L | MIN | 23.00 | 19.00 | 4.00 | 1.00 | ||||||
MAX | 0.02 | 2.00 | 0.045 | 0.035 | 1.00 | 28.00 | 23.00 | 5.00 | 0.10 | 2.00 | |
ASTM A403 WP31254 | MIN | 17.50 | 19.50 | 6.00 | 0.18 | 0.50 | |||||
MAX | 0.02 | 1.00 | 0.030 | 0.010 | 0.80 | 18.50 | 20.50 | 6.50 | 0.25 | 1.0 | |
ASTM A403 WP321 | MIN | 9.00 | 17.00 | ||||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 12.00 | 19.00 |
MATERIAL | ASTM A403 WP304 | ASTM A403 WP316 | ASTM A403 WP904L | ASTM A403 WP31254 | ASTM A403 WP321 |
T.S (MPA) | 515 min | 515 min | 490 min | 650-820 | 515 min |
Y.S (MPA) | 205 min | 205 min | 220 min | 300 min | 205 min |
EL % | 28 min | 28 min | 28 min | 28 min | 28 min |
Stainless steel socket weld pipe fittings are high-pressure pipe fittings where the pipe is inserted into a recessed area (socket) of the fitting and then welded around the outside.They provide a strong, leak-proof connection mainly used for small-bore piping systems requiring high pressure and high-temperature service.
Shape | Straight and Reducing Fittings |
Size Range | 1/8" - 4" / DN6 - DN100 |
Pressure Rating | Class 3000lbs, 6000lbs, 9000lbs |
Standard | ASME B16.11, BS3799 |
Stainless Steel | ASTM A182 F304/304L/304H, F316/316L, F310S, F317, F347, F904L |
Socket Weld Elbows (45° and 90°): Change the direction of flow.
Socket Weld Tees (Equal Tee, Reducing Tee): Split or combine flow.
Socket Weld Couplings (Full, Half, Reducing): Join two pipes.
Socket Weld Crosses: Connect four pipes at right angles.
Socket Weld Caps: Seal the end of a pipe.
Socket Weld Unions: Allow easy disassembly of piping for maintenance.
Threaded pipe fittings are fittings with internal (female) or external (male) threads used to connect pipes mechanically by screwing them together.
They are widely used in small-diameter piping systems (usually up to 4 inches) where easy assembly, disassembly, and moderate pressure resistance are required.
Shape | Straight and Reducing Elbows( 45 degree and 90 degree) |
Size Range | 1/8"- 4"/ DN6-DN100 |
Pressure Rating | CL2000/3000/6000 |
Standard | ASME B16.11 |
Stainless Steel | ASTM A182 F304/304L/304H, F316/316L, F310S, F317, F347, F904L |
ASTM A182 F304 | MIN | 8.0 | 18.0 | |||||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | 0.10 | ||||
ASTM A182 F316 | MIN | 10.0 | 16.0 | 2.00 | ||||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 | 0.01 | |||
ASTM A182 F321 | MIN | 9.00 | 17.00 | 0.10 | 5(C+N) | |||||||
MAX | 0.08 | 2.00 | 0.05 | 0.03 | 1.00 | 12.00 | 19.00 | 0.70 | ||||
ASTM A182 F321H | MIN | 0.04 | 9.00 | 17.00 | 4（C+N) | |||||||
MAX | 0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 12.00 | 19.00 | 0.7 | ||||
ASTM A182 F347 | MIN | 9.00 | 17.00 | |||||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 13.00 | 20.00 | |||||
ASTM A182 F904L (N08904) | MIN | 23.00 | 19.00 | 4.00 | 1 | |||||||
MAX | 0.02 | 2.00 | 0.040 | 0.030 | 1.00 | 28.00 | 23.00 | 5.00 | 0.10 | 2.00 |
MATERIAL | ASTM A182 F304 | ASTM A182 F316 | ASTM A182 F321 | ASTM A182 F321H | ASTM A182 F347 | ASTM A182 F904L |
T.S (MPA) | 515 min | 515 min | 515 min | 515 min | 515 min | 490 min |
Y.S (MPA) | 205 min | 205 min | 205 min | 205 min | 205 min | 215 min |
EL % | 30 min | 30 min | 30 min | 30 min | 30 min | 35 min |
R/A % | 50 min | 50 min | 50 min | 50 min | 50 min |
1. Industrial and Chemical Processing:
Transportation of Corrosive Substances: Stainless steel's excellent resistance to a wide array of chemicals, acids, and alkalis makes it ideal for safely conveying aggressive media.
High-Temperature Applications: Certain grades of stainless steel can withstand elevated temperatures, crucial in many industrial processes.
2. Oil and Gas Industry:
Offshore and Onshore Pipelines: Used in drilling platforms, processing plants, and refineries to handle crude oil, natural gas, and other hydrocarbons.
Resistance to Harsh Environments: Stainless steel can withstand high pressures, temperature fluctuations, and exposure to corrosive substances often found in the oil and gas sector.
3. Power Generation Plants:
High-Temperature and High-Pressure Applications: Used in steam turbine piping, boiler systems, and other critical areas.
Resistance to Corrosion and Erosion: Ensures the reliable transport of steam, water, and other fluids.
4. Construction and Architecture:
Structural Support: Used in building frames, bridges, and other structural applications due to its strength and corrosion resistance.
Fluid Transport: For plumbing, HVAC systems, and other building services.
5. Automotive and Transportation:
Exhaust Systems: Stainless steel's high-temperature resistance and durability make it suitable for exhaust components.
Fuel and Brake Lines: Offers strength and corrosion resistance for critical fluid transfer systems.
-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 Pipe Fittings 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. Does stainless steel fittings corrode galvanized pipe?
Yes, stainless steel fittings can accelerate the corrosion of galvanized pipe under certain conditions. This occurs due to a phenomenon called galvanic corrosion (also known as bimetallic corrosion).
2. What is the difference between 304 and 316 stainless steel fittings?
The key difference between 304 and 316 stainless steel fittings is their chemical composition, with 316 containing molybdenum. This addition provides 316 with significantly enhanced corrosion resistance, especially against chlorides and pitting, making it ideal for marine and harsh chemical environments where 304 might be susceptible. While 304 offers excellent general corrosion resistance and is more cost-effective for many applications, 316's superior durability in demanding conditions often justifies its higher price.
3. Which is better, PVC or stainless steel?
PVC is lightweight, inexpensive, and resistant to many chemicals, making it ideal for low-pressure, non-corrosive, and indoor environments like residential plumbing or irrigation.
In contrast, stainless steel offers superior strength, high-pressure resistance, and excellent durability in harsh, high-temperature, or corrosive conditions, such as industrial, marine, or food-grade systems.
In short, PVC is better for cost and corrosion resistance in mild conditions, while stainless steel is better for strength and longevity in demanding environments.
