SS 317 Pipe Fittings are made from stainless steel alloy containing chromium, nickel, and molybdenum. They provide excellent corrosion resistance and are suitable for industrial piping systems, such as water supply lines, oil and gas pipelines, and other high-pressure hydraulic systems. Their superior strength makes them ideal for these applications, while their excellent weldability makes them easy to install with minimal disruption. Also, SS 317L Pipe Fittings boast exceptional machinability characteristics that make them great for precision assemblies.
Stainless Steel 317 Pipe Fittings are generally used in high-temperature applications and come in various shapes, such as elbows, tees, crosses, reducers, unions, and nipples. Depending on the application, they also come in various sizes ranging from 1/8” to 48”. This type of fitting is often chosen for its resistance to corrosion and oxidation in high-temperature environments. SS 317 Butt Weld Pipe Fittings are also more resistant to stress corrosion than other stainless steels due to their higher molybdenum content


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Stainless Steel 317L Pipe Fittings are mostly used in chemical processing applications such as food processing equipment, dairy processing equipment, oil refinery piping systems, petrochemical tanks, and pipelines. They're ideal for handling phosphoric acid-based solutions because they have superior corrosion resistance against acidic solutions compared to other grades of stainless steel. The low carbon content makes this grade especially suitable for welding since it reduces the risk of intergranular corrosion after welding. Stainless Steel 310S Pipe Fittings, Stainless Steel 316H Pipe Fittings, and many more grades are also available.


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The main benefit of using 317L Stainless Steel Pipe Fittings is that they provide superior strength and durability while being highly resistant to corrosion or oxidation in harsh environments. They also require minimal maintenance due to their nonporous surface, which helps keep out dirt or debris that could build up over time if not maintained properly. In addition, their superior heat resistance makes them perfect for hot liquids or steam lines where temperatures may exceed 700 degrees Celsius (1,292 Fahrenheit). Also, because Stainless Steel 317L Butt Weld Fittings don’t rust easily when exposed to acids or other corrosive substances like some metals, they are perfect for use in any application where chemical exposure is possible. Different types of products are available, such as Titanium Gr 2 Sheets, Incoloy 825 Sheets, etc.

Stainless Steel 317/317L Pipe Fittings

Stainless Steel 317/317L Pipe Fittings

UNS S31703 Seamless Pipe Fittings give superior strength and durability while being highly resistant to corrosion or oxidation in harsh environments, making them an ideal choice for chemical applications such as food processing equipment or oil refinery piping systems. Moreover, they require minimal maintenance due to their nonporous surface, which helps keep out dirt or debris that could build up over time if not maintained properly while also providing superior heat resistance, makes them perfect for use with hot liquids or steam lines where temperatures may exceed 700°C (1,292°F).

What is the difference between Stainless Steel 317 and 317L Pipe Fittings?

Stainless Steel 317 and 317L are both austenitic SS alloys with similar chemical compositions, but they differ in their carbon content, which determines their weldability, corrosion resistance, and other properties. Stainless Steel 317 has a higher carbon content than 317L, typically ranging from 0.08% to 0.10%, which provides it with higher strength and hardness.

Are Stainless Steel 317 Pipe Fittings Corrosion resistant?

Yes, SS 317 Pipe Fittings are corrosion-resistant. SS 317 is an austenitic stainless steel alloy with a high concentration of chromium, nickel, and molybdenum, which provides excellent corrosion resistance. The chromium content in SS 317 Fittings helps to form a protective oxide layer on the surface of the metal, which acts as a barrier against corrosion.

What are common applications of Stainless Steel 317L Pipe Fittings?

Stainless Steel 317L Pipe Fittings are commonly used in a wide range of industries where corrosion resistance, high-temperature strength, and durability are required. They are particularly well-suited for use in the chemical and petrochemical industries, where they are used in processing equipment, storage tanks, and piping systems.

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SS 317/317L Butt weld Pipe Fittings Specification

Specifications ASTM A403 / ASME SA403

DimensionsASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS SP-79

Size1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)

Type Seamless / Welded / Fabricated

Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom

Thickness Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS

Grade 317/317L UNS (S31700, S31703), DIN (1.4449, 1.4438)

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Stainless Steel WP317/317L Butt weld Fittings Equivalent Indian Standard

STANDARD UNS WNR. JIS EN
SS 317 S31700 1.4449 SUS 317 -
SS 317L S31703 1.4438 SUS 317L X2CrNiMo18-15-4

ASTM A403 SS WP317/317L Pipe Fittings Chemical Composition

Grade C Mn Si P S Cr Mo Ni Fe
SS 317 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 - 20.00 3.00 - 4.00 11.00 - 15.00 57.845 min
SS 317L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 - 20.00 3.00 - 4.00 11.00 - 15.00 57.89 min

WP317/317L Stainless Steel ASME SA403 Butt weld Fittings Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
7.9 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Other Types of 317/317L Stainless Steel Butt weld Pipe Fittings

  • Stainless Steel WP317 Elbow
  • WP317L Stainless Steel Pipe Tee
  • Stainless Steel WP317 Buttweld Cross
  • SS 317 Butt weld Pipe Reducer
  • Stainless Steel 317L End Cap

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