Stainless Steel 316 Pipe Fittings

Frequently used to manoeuvre the conveyance of either water, gas, or liquid in domestic or commercial environments Werkstoff Nr. 1.4401 Pipe Fittings are reckoned to be apart of a piping system.

Stainless Steel 316 Pipe Fittings

Used to either connect or adapt a piping system, the Stainless Steel 316 Pipe Fittings cover many components, the most popular of which is an elbow. Being able to change the direction of the flow in varying angles, the astm a403 wp316 elbow commonly is seen used as either a 90 degree, a 45 degree or a 22.5 degree angle. As expected, the description of an ANSI B16.9 SS 316 90 Deg Elbow is what explains that this particular fitting is used to change the flow of a piping system to a 90 degree angle. Generally, any fitting with the term reducer in fittings concedes that there is to be a change in the size of the pipe in a system.


SS 316 Eccentric & Concentric Reducer is what permits the change to meet hydraulic flow requirements of the piping system. Used to connect pipes of different sizes, the ASME SA403M Stainless Steel WP 316 Stub End is used in times when the support of a rotating back up flange is needed. Stub ends are known to be a substitute for welded flanges. Also referred to as a socket weld, the 316 stainless steel weld fittings are essentially a small detail that is to be placed into a recessed portion of a Valve, fitting or flange. A product and chemical analysis are to be conducted on the astm a403 grade wp316 buttweld fittings in conformance to the specification. Another mandate according to the ASTM A403 SS 316 Equal & Unequal Tee is that all fittings are required to be heat treated per the specification.

 

Material Specification of Stainless Steel 316 Pipe Fittings

Specifications of Stainless Steel 316 Pipe Fittings American Society for Testing and Materials A403 / American Society of Mechanical Engineers SA403
316 SS Elbow Size in Inch 1/8 Inch TO 48 Inch
MSS-SP-43 SS 316 buttweld elbow Standards American Society of Mechanical Engineers/American National Standards Institute B16.9, American Society of Mechanical Engineers B16.28
Type of 316 SS pipe fittings Seamless, Welded & Fabricated

Dimensions Schedule of 316 SS Elbow

DIN Schedule 105 Schedule 405 Schedule 805
90 Degree Elbow 45 Degree Elbow Equal Tee 90 Degree Elbow 45 Degree Elbow Equal Tee 90 Degree Elbow 45 Degree Elbow Equal Tee
8 0.02 0.01 0.03 0.03 0.02 0.06 0.04 0.03 0.07
10 0.03 0.02 0.05 0.03 0.02 0.03 0.06 0.04 0.09
15 0.06 0.03 0.09 0.08 0.04 0.10 0.10 0.05 0.14
20 0.07 0.03 0.13 0.08 0.04 0.17 0.11 0.05 0.20
25 0.14 0.08 0.28 0.15 0.11 0.29 0.22 0.14 0.38
32 0.23 0.11 0.49 0.26 017 0.59 0.40 0.23 0.68
40 0.30 0.17 0.68 0.40 0.23 0.86 0.51 0.29 1.02
50 0.50 0.25 0.85 0.70 0.40 1.28 0.91 0.59 1.59
65 0.85 0.48 At 1.40 0.77 2.19 1.81 0.99 3.13
80 1.25 0.63 1.77 2.20 1.08 3.31 2.97 1.50 4.45
90 1.70 0.75 2.67 2.83 1.42 4.08 4.00 2.00 5.44
100 2.10 1.08 3.46 447 2.09 5.27 6.18 281 771
150 5.45 2.72 8.07 10.89 5.44 10.99 16.32 8.16 13.61
200 10.20 5.33 15.65 21.54 10.77 20.91 33.11 16.56 28.12
250 18.15 9.75 26.46 38.56 19.27 35.38 51.71 25.86 49.90
300 25.80 13.62 39.46 59.42 29.71 62.14 79.38 39.69 83.91

316 SS pipe fittings Chemical Equation

Grade Carbon Manganese Silicon Phosphorus sulphur Chromium Molybdenum Nickel Ferrum
Stainless Steel 316 Pipe Fittings 0.08 Maximum 2.0 Maximum 1.0 Maximum 0.045 Maximum 0.030 Maximum 16.00 - 18.00 2.00 - 3.00 11.00 - 14.00 67.845 Minimum

Mechanical Properties Table of MSS-SP-43 SS 316 buttweld elbow

Density Elongation Melting Point Tensile Strength High Yield Strength
8.0 gram/cm3 35 % 1400 °C PSI 75000 PSi 30000

Is 316 stainless steel weld fittings are best for corrosion resistance sulfuric acid?

At a high concentration, sulfuric acid tends to exhibit dehydrating and oxidizing properties, due to its strong acidic nature. This is why a lot of metals are prone to corrosion in the presence of sulfuric acid at high concentration. However, in the case of stainless steel grade 316, the addition of molybdenum in the alloy proves to be its gain. When molybdenum is added to any austenitic stainless steel grade such as grade 316, the alloys ability to resist sulfur containing compounds increases. In plain words, the addition of molybdenum to grade 316 provides greater resistance corrosion in comparison to alloy 304, to general corrosion by reducing acids, such as sulfuric acid.

This being said, it is important to note that grade 316 as well as grade 316L exhibit strong resistance to corrosion at room temperature settings. In the case of weld fittings, grade 316, the corrosion resistance properties could be enhanced by anodic protection.  AP or as referred to Anodic protection is a method that is used to control the corrosion of a metal surface, in this case, stainless steel 316, by making it the anode of an electrochemical cell while maintaining control over the electrode potential in a zone where the metal is passive or in other words, where passivation occurs. In fact, Anodic protection is a technique that is effective for grade 316 as this process extends the temperature of application of stainless steel in all strong acid solutions. Therefore this form of electroplated weld fittings can be used across a wide range of application involving sulfuric acid. Right from the production of fertiliser to its use in the chemical industry and steel making industry 316 stainless steel fittings an ideal choice for various sulfur containing applications.