Stainless Steel 317/317L Seamless Pipes are of premium quality and have outstanding resistance to corrosion and are made using chromium, nickel, and molybdenum. They are designed and developed to withstand and resist contaminating agents like chlorine and have enhanced corrosion resistance and resistance to stress corrosion. They have excellent strength and superior resistance to corrosion and are ideal and suitable for applications involving higher temperatures. SS 317L is of low-carbon content and is superior because of its outstanding weldability and resistance to carbide precipitation and is ideal and suitable for applications involving greater weldability. They are widely used in applications involving chemicals, pharmaceutical products, food processing units, and in the marine environment.
Capable of complying with demanding requirements like ASTM A312 and ASME SA312, these Stainless Steel 317/317L Seamless Pipes offer excellent strength requirements: high tensile strength, high yield strength, and considerable elongation. These pipes have a remarkable resistance to pitting corrosion, rust corrosion, and oxidation. They are effectively capable of performing even in demanding environments and are widely used in applications like heat exchangers, boiler vessels, and ship components due to these excellent features.
| Specification Parameter | Technical Details & Range |
| Industry Standards | ASTM A312 / ASME SA312 |
| Seamless Pipe Size | 1/2" NB to 16" NB (Up to 24" NB available ex-stock) |
| Outside Diameter (OD) | 6.00 mm OD up to 914.4 mm OD (Steel tubes available ex-stock) |
| Thickness Range | 0.3 mm to 50 mm |
| Schedules | SCH 5, 10, 40, 80, 80S, 160, XXS, XS |
| Type | Seamless (Primary focus) |
| Form/Shape | Round Pipes, Square Pipes, Rectangular Pipes |
| Length | Single Random, Double Random, and Custom Cut-to-Length |
| End Finish | Plain End, Beveled End, Threaded |
| Surface Finish | 2B, No.1, No.4, No.8 Mirror Finish; Custom finishes as per requirement |
| Delivery Condition | Annealed & Pickled, Polished, Bright Annealed, Cold Drawn |
| EN 10216-5 (Seamless) | Grade 317/317L (1.4449) Seamless pipes for pressure purposes |
| EN 10217-7 (Welded) | Grade 317/317L (1.4438) Welded pipes for pressure purposes |
| 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 | 57.84 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 |
| Grade | Tensile Strength (min) | Yield Strength (0.2% Offset) (min) | Elongation (min) | Hardness (max) |
| SS 317 / 317L | 75,000 psi (515 MPa) | 30,000 psi (205 MPa) | 35% | Rockwell B (HRB): 95 / Brinell (HB): 217 |
Metinox Overseas offers a comprehensive range of SS 317/317L pipe types to meet diverse industrial requirements.
SS 317_317L Seamless Round Pipes
Seamless Square Pipes
Seamless Rectangular Pipes
| Feature | SS 317 (UNS S31700) | SS 317L (UNS S31703) |
| Carbon Content | High (0.08% max) | Low (0.03% max) |
| Weldability | Good, but susceptible to sensitization | Excellent; resistant to sensitization |
| Post-Weld Heat Treatment | Often required to restore corrosion resistance | Not required in most applications |
| Corrosion Resistance | Superior to 316, but vulnerable at welds | Best overall; prevents intergranular corrosion |
| Tensile Strength | Slightly higher due to Carbon | Standard high strength (515 MPa min) |
| Creep Strength | Better at very high temperatures | Standard for high-temp service |
| Common Application | Structural parts, non-welded components | Chemical tankers, FGD scrubbers, and welded piping |
| Standard / Grade | UNS | Werkstoff Nr. | EN Designation | JIS (Japan) |
| SS 317 | S31700 | 1.4449 | � | SUS 317 |
| SS 317L | S31703 | 1.4438 | X2CrNiMo18-15-4 | SUS 317L |
The process of making SS 317/317L seamless pipes involves numerous processes that are sophisticated to produce high-quality, durable, and reliable pipes. An approximate list of the steps is as follows:
The seamless pipes SS 317/317L undergo several rounds of quality inspection in order to make sure that they can reach the highest level of performance and reliability. Some of the frequently used tests are:
Dimensional Check: Make sure that the pipes are of the specified sizes in terms of outer diameter, thickness of the wall and length.
Hydrostatic Test: A hydrostatic test is one that ensures that the pipes can handle pressure. This includes loading up the pipe with water and pressurizing it to determine whether there is leakage or any form of weakness.
Tensile Strength Test: Tests how tensile forces can be applied to a pipe and the pipe contracts and breaks.
Impact Test: It determines the toughness characteristics of pipes in case a sudden force or shock is exerted at low temperatures.
Corrosion resistance test: When used in the industrial field ensures the pipe is not prone to corrosion in aggressive media and thus a good performance.
Eddy Current Testing: It is employed to identify the cracks or dents on the surface, which may endanger the integrity of the pipe.
Chemical Composition Analysis: Maintains the chemical makeup of the pipe at specified limits, which is a consideration that is vital in corrosive media performance.
Non-Destructive Testing (NDT): The non-destructive testing used on these pipes consists of the ultrasonic and the magnetic particle methods of testing to detect internal or external defects.
The SS 317/317L seamless pipes are versatile and durable, thus found to suit most industries. The major applications are listed below:
Some of the commonly used piping materials for offshore platforms, refinery, and pipeline installation are stainless steel grades 317 and 317L. These are quite resistant to fluids that cause corrosion and have good resistance to heat and stress corrosion cracking.
SS 317/317L pipes are used in chemical reactors, distillation columns and heat exchangers and offer resistance to aggressive chemicals and high temperatures and are therefore necessary to process safely.
These pipes find applications in power plants in boilers, steam generators and heat exchangers. The heat and corrosion resistance of their products is essential to the performance and safety.
SS 317/317L is the preferred choice in marine and offshore conditions where the resistance to corrosion can be enhanced, especially in seawater systems and in offshore platforms where there is a tendency to corrosion by chlorides.
Applied in hygienic purposes, these pipelines assist in the transportation of liquids and food processing. Doing this is possible due to their corrosion resistance, biocompatibility, and easy cleanability, which guarantee hygiene and elimination of contamination.
These structural and pressure pipes are also employed in structural piping since they are strong, durable, and they are resistant to corrosion, which makes them applicable in many industrial applications.
There are many reasons to choose Metinox Overseas for any type of stainless steel products. Some of the common reasons are given below.
Choose Metinox Overseas � Your Reliable SS 317/317L Seamless Pipe Supplier & Exporter.
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SS 317/317L seamless pipes are high-quality stainless steel pipes known for their corrosion resistance, strength, and ability to withstand high temperatures. They are used in various industries where durability and performance are critical.
The SS 317 has a higher carbon content; on the other hand, SS 317L has lower carbon for improved weldability and reduced risk of carbide precipitation. SS 317L is preferred in welding applications.
These pipes are used in industries like oil & gas, chemical processing, marine, power plants, pharmaceuticals, and food processing due to their corrosion resistance and ability to handle high-pressure and high-temperature environments.
SS 317/317L contains chromium (18-20%), nickel (11-15%), molybdenum (3-4%), and small amounts of carbon, manganese, and silicon, making it highly resistant to corrosion and oxidation.
The SS 317/317L seamless pipes go through many quality tests, including hydrostatic testing, tensile strength testing, chemical analysis, hardness testing, impact testing, and non-destructive testing (like eddy current and ultrasonic tests) to ensure the pipes meet industry standards.
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