Raw Material Selection
The manufacturing process of buttweld fittings begins with the careful selection of raw materials.
What is the difference between Stainless Steel 316 and 316L?
Stainless Steel 316 and 316L are both austenitic stainless steel alloys, but the "L" in 316L stands for "low carbon." The main difference between the two is the carbon content. Stainless Steel 316L contains a lower carbon content compared to 316, which makes it more resistant to sensitization, a process that can cause intergranular corrosion in certain environments.
What are the common applications of Stainless Steel 316/316L Buttweld Pipe Fittings?
Stainless Steel 316L buttweld pipe fittings are commonly used in various industries. Some common applications include chemical processing, petrochemical, oil and gas, pharmaceuticals, food and beverage processing, marine environments, and high-corrosion environments where resistance to chemicals and acids is required.
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What are the benefits of using Stainless Steel 316/316L Pipe fittings?
Stainless Steel 316 pipe fittings offer several benefits. They have excellent corrosion resistance, high strength, and good weldability. These fittings also provide resistance to pitting and crevice corrosion in chloride environments. Additionally, they exhibit good heat resistance and are suitable for use in both high and low-temperature applications.
What are the available sizes and dimensions of these fittings?
Stainless Steel 316/316L buttweld pipe fittings come in various sizes and dimensions to suit different requirements. Common sizes range from 1/2 inch to 24 inches in diameter, with a variety of standard wall thicknesses such as Schedule 10, Schedule 40, and Schedule 80. Specific dimensions can vary depending on the manufacturer and standards followed.
How do Stainless Steel 316/316L buttweld fittings compare to other materials?
Stainless Steel 316/316L buttweld fittings offer several advantages over other materials. Compared to carbon steel fittings, they provide superior corrosion resistance, making them suitable for harsh environments. When compared to other stainless steel grades, 316/316L exhibits excellent resistance to chloride-induced pitting and crevice corrosion. However, it's important to consider factors like cost, specific application requirements, and compatibility with other materials when selecting fittings for a particular project.
| Specifications | ASTM A403 / ASME SA403 |
| Size | Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48" |
| Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Type | DN15-DN1200 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom MSS Sp-43 Stainless Steel Pipe Fitting |
| Size Range | ½" NB to 24" NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) ASTM A403 Stainless Steel Buttweld Fitting |
| Elbows | Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D,
3D, 4D, 5D, 6D, 7D-40D . Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO |
| Connection | Welding |
| Manufacturing process | Forge, Cast, Push, Press, etc. |
| Key markets and industries |
Bitumen upgraders. Heavy oil refineries. Petrochemicals and acids. Nuclear power (mostly seamless). |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Specialized manufacturer of | 90º Elbows, 45º Elbows, Tees, Crosses, Reducers, Pipe Cap, Stub End, Pipe Bend |
| We provide Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
| SS 316 | S31600 | 1.4401 / 1.4436 | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 | SUS 316 | 316S31 / 316S33 | - |
| SS 316L | S31603 | 1.4404 / 1.4435 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 |
| C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 316 (S31600) |
0.08 max |
2.0 max |
0.75 max |
0.045 max |
0.03 max |
min: 16.0 max: 18.0 |
min: 2.0 max: 3.0 |
min: 10.0 max: 14.0 |
0.10 max |
| 316L (S31603) |
0.03 max |
2.0 max |
0.75 max |
0.045 max |
0.03 max |
min: 16.0 max: 18.0 |
min: 2.0 max: 3.0 |
min: 10.0 max: 14.0 |
0.10 max |
| Grade | Tensile Strength ksi (min) |
Yield Strength 0.2% ksi (min) |
Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
| 316 (S31600) | 75 | 30 | 40 | 217 | 95 |
| 316L (S31603) | 70 | 25 | 40 | 217 | 95 |
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