On January 21, 2025, we received an order from our old customer for 904L stainless steel pipe fittings. We quoted the customer and provided product information, including MTC, data sheet, delivery date, etc. We also communicated with the customer on WeChat. The customer was very interested in our quotation and confirmed the order with us the next day. The customer was very satisfied with the quality of our product, so the customer placed the order very quickly.
The purchase order is as follows:
| ITEM | DESCRIPTION | Quantity | Unit |
| 1 | ELBOW 45°,DN25 Sch10s, ASTM A403/SS904L | 56 | EA |
| 2 | RED TEE, BW, DN25XDN15 Sch 10s/SS904 | 72 | EA |
| 3 | ELBOW,90,SR,BW,A234 WPB,DN500,SCH20 | 20 | EA |
Inspection photos
904L Stainless Steel is a high-alloy, corrosion-resistant stainless steel that contains higher amounts of nickel, molybdenum, and copper compared to standard stainless steels like 304 or 316. This alloy offers excellent resistance to corrosion, particularly against pitting, crevice corrosion, and stress corrosion cracking in harsh environments such as acidic or chloride-rich environments.
904L Stainless Steel Pipe Fittings are typically used in industries where corrosion resistance, high strength, and durability are critical. Below is a detailed overview of 904L stainless steel pipe fittings.
Key Features of 904L Stainless Steel Pipe Fittings
✅ Excellent Corrosion Resistance – Resistant to pitting, crevice corrosion, and stress corrosion cracking.
✅ High Strength – Can withstand high pressure and temperature environments.
✅ Resistant to Acids & Chlorides – Performs well in harsh, acidic, and chloride-laden environments.
✅ Durability – Long-lasting, even in the most aggressive environments.
✅ Non-Magnetic – Suitable for applications requiring non-magnetic materials.
A403 WP904L Butt Weld Fittings Specification
| 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 |
| Stainless Steel Grades | ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L |
Stainless Steel 904L Pipe Fittings Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A403 WP904L | MIN | 23.00 | 19.00 | 4.00 | |||||
| MAX | 0.02 | 2.00 | 0.045 | 0.035 | 1.00 | 28.00 | 23.00 | 5.00 |
Mechanical Properties of 904L Stainless Steel Pipe Fittings
| MATERIAL | ASTM A403 WP904L |
| T.S (MPA) | 490 min |
| Y.S (MPA) | 220 min |
| EL % | 28 min |
Types of 904L Stainless Steel Pipe Fittings
Used to change the direction of the piping system.
Commonly available in 45°, 90°, and 180° angles.
Tees
Used to split or combine flow in a piping system.
Available in equal and reducing tees.
Reducers
Used to connect pipes of different diameters.
Available in concentric and eccentric reducers.
Couplings & Unions
Used to join or disconnect pipes easily.
Can be threaded or welded to the pipe ends.
Caps
Used to close off the end of a pipe.
Available in threaded or welded designs.
Bends
Used to change the direction of flow in a piping system without compromising pressure.
Stub Ends
Used with lap joint flanges, typically for quick disassembly and frequent access.
Applications of 904L Stainless Steel Pipe Fittings
For handling strong chemicals, acids, and corrosive gases.
Pharmaceutical Industry
For systems requiring high purity and corrosion resistance.
In offshore platforms, pipelines, and refineries.
Resistant to chloride-induced corrosion in seawater environments.
Suitable for applications in high-temperature, high-pressure systems.
Desalination Plants
For systems exposed to salty or brine water.
Benefits of Using 904L Stainless Steel Pipe Fittings
Superior Corrosion Resistance – Ideal for aggressive environments.
Longevity & Durability – Offers long service life with minimal maintenance.
Excellent Performance in High-Temperature Applications – Resists scaling and oxidation.
Reduced Maintenance Costs – Lower risk of failures due to corrosion or wear.
Non-Magnetic Properties – Suitable for sensitive applications where magnetism could interfere.