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Tri-clamp Sizing
  1. Clamp Size is determined by the outside diameter of the tubing, NOT the outside diameter of the ferrule.
  2. You can join the compatible sizes, such as the ½” and the ¾”, but remember the tubing sizes can be different and will affect flow. Consequently, use the larger size gasket.
  3. Tri-clamp fitting typically has about a ½” greater diameter than the outside diameter of the tube.
tri-clamp
Ferrule Dia.Tube OD (D)Tube ID (E)Flange Dia. (B)
1/2"0.5000.3750.995
3/4"0.7500.6250.995
1"1.0000.8701.988
1 1/2"1.5001.3651.988
2"2.0001.8402.519
2 1/2"2.5002.2503.051
3"3.0002.7503.582
4"4.0003.7504.685
6"6.0005.7746.565
8"8.0007.7748.605
10"10.0009.71010.573
12"12.00011.71012.573

For Reference Only

NPT Fittings

U.S. national technical standards for screw threads used on threaded pipes and pipe fittings.

NPT fittings

The pipe chart shows the outside diameters and the wall thicknesses for various pipe sizes. The dimensions vary according to the schedule number. The most common is Schedule 40 and the rarest is Schedule 5. The nominal pipe size (NPS) is not determined by the outside diameter nor the inside diameter of a pipe.

Pipe Schedules Chart
Pipe SizePipe ODSCH 10SSCH 40SSCH 80S
IDWall ThickWeight Lb/FtIDWall ThickWeight Lb/FtIDWall ThickWeight Lb/Ft
1/8".405".307.049.186.269.068.245.215.095.314
1/4".540".410.065 .329.364.088 .425.302.119.535
3/8".675".545.065.423.493.091.567.423.126.739
1/2".840".674.083.671.622.109.851.546.1471.088
3/4"1.050".884.083.8572.824.1131.131.742.1541.474
1"1.315"1.097.1091.4041.049.1331.679.957.1792.172
1 1/4"1.660"1.442.1091.8061.380.1402.2731.278.1912.997
1 1/2"1.900"1.682.1092.0851.610.1452.7181.500.2003.631
2"2.375"2.157.1092.6382.067.154 3.8531.939.2185.022
2 1/2"2.875"2.635.120 3.5312.469.2035.7932.323.2767.651
3"3.5"3.260.1204.3323.068.2167.5762.900.30010.25
3 1/2"4.0"3.760.1204.9373.548.226 9.1093.364.31812.51
4"4.5"4.260.1205.6134.026.23710.7903.826 .33714.98
5"5.563"5.295.1347.7705.047.25814.624.813.37520.78
6"6.625"6.357.1349.2906.065.28018.975.761.432 28.57
8"8.625"8.329.148 13.407.981.32228.557.625.50043.39
10"10.75"10.420.16518.6510.020.36540.489.750.50054.74
12"12.75"12.390.18024.1612.000.37549.5611.750.50065.42
14"14"13.624.18827.7313.250.37554.5713.000.50072.09
16"16"15.624.18831.7515.250.37562.5815.000.50082.77
18"18"17.624.18835.7617.250.37570.5917.000.50093.45
20"20"19.564.21848.0519.250.37578.619.000.500104.10
24"24"23.500.25063.4123.250.37596.4223.000.500125.50
30"30"29.376.31298.9329.250.375118.6529.000.500157.53

For Reference Only

ID Stainless Steel Pipe
ID Inside Diameter14 gauge (lb/ft)11 gauge (lb/ft)10 gauge (lb/ft)3/16” thk. (lb/ft)1/4” thk (lb/ft)
1 ½”1.32.2   
2”1.82.9   
2 ½”2.23.6   
3"2.64.3   
4"3.55.6   
5"4.37.0   
6"5.28.4   
8"6.911.1   
10" 13.8   
12" 16.6   
14" 19.321.6  
16" 2224.733.1 
16" 4.827.737.2 
18" 27.530.841.355.3

For Reference Only

Tubes Size
Tube Size ODThicknessWeight Lb/FtPressure (PSIG)
1/2"0.0650.311815.22
3/4"0.0650.481265.15
1"0.0650.65970.93
1 1/2"0.0651.00662.70
2"0.0651.34503.01
2 1/2"0.0651.69405.34
3"0.0652.04339.43
4"0.0833.49338.11
6"0.1146.92320.86
8"0.1149.30242.04
10"0.1414.00250.90
12"0.1416.90209.72

For Reference Only

Hydraulic Seamless Tube
OD Outside DiameterTube Wall (inch)Weight Lb/FtPressure (PSIG)
1/8"0.0280.0298500
1/4"0.0350.805100
0.0490.1057500
0.0650.12810200
3/8"0.0350.1273300
0.0490.1714800
0.0650.2156500
1/2"0.0350.1742600
0.0490.2363700
0.0650.3025100
5/8"0.0650.3894000
3/4"0.0650.4763300
1"0.0830.8133100
1 1/4"0.0951.1872800
0.1201.4733600
1 1/2"0.1201.7923000
0.1341.9813400
2"0.1342.7052500
0.1883.6863600

For Reference Only

  • Buna - Excellent resistance to petroleum-based fluids. Not recommended for strong acids and ozone. -40° F to 250° F (-40°C to 121°C).
  • Viton - Excellent oil and air resistance. Very good chemical resistance. Not recommend for continuous use in SIP (steam in place) procedures. -20º F to 410º F (-30°C to 210°C).
  • EPDM - Great ozone, chemical and aging resistance. Do not use EPDM gaskets for mineral oils, solvents, or aromatic hydrocarbons. -60° F to 300° F (-51°C to 150°C).
  • Silicone - Abrasion resistance: poor and very flexible for low temperature. It is not always a good choice with oils. -75° F to 450° F (-60°C to 232°C).
  • Teflon - Abrasion Resistance: fair (not recommended where large temperature variations occur frequently, leakage can occur) -40° F to 450° F (–40 to +232 °C).
  • SS304 Type 304, with its nickel-chromium content and low carbon content, is the most versatile and most used austenitic stainless steels. It contains 18% chromium, 8% nickel and 0.8% carbon. Type 304 is resistant to oxidation, corrosion and durability.
  • SS316 Type 316 is an austenitic stainless steel chrome-nickel stainless steel and heat-resistant steel with superior corrosion resistance compared to other chrome-nickel steels when exposed to types of corrosive agents chemical. It contains 18% chromium and 8% nickel and 0.8% carbon and maximum 3% molybdenum. 316 contains molybdenum, it has a greater resistance to chemical attack than 304. Type 316 is more durable and easy to clean. It is much more resistant to solutions of sulfuric acid, chlorides, bromides, iodides and fatty acids at high temperature. Molybdenum are needed to manufacture certain pharmaceuticals to avoid excessive metal contamination.
Grit Finish and estimated RMS and Ra Values
Grit FinishRMS (Micro-inch)RMS (Micron)Ra (Micro-inch)Ra (Micron)
361604.061423.61
60982.49872.21
80802.03711.8
120581.47521.32
150471.2421.06
USDA Bead Blast471.2421.06
180340.86300.76
220210.53190.48
240170.43150.38
320140.36120.3
400100.2590.23
Mirror50.1340.1

For Reference Only

  • Example of Boiling Water at 212 *F and 0 psig - At atmospheric pressure 0 psig, water boils at 212 *F. 180 Btu/lb of energy is required to heat 1 lb of water to saturation temperature 212 *F. Another 970 Btu/lb of energy is required to evaporate the 1 lb of water at 212 *F to steam at 212 *F.
  • Standard Atmospheric Pressure - 1 atm = 1.01325 bar = 101.3 kPa = 1.013 105 Pa = 14.696 psi (lbf/in2)= 760 mmHg =10.33 mH2O = 760 torr = 29.92 inHg = 1013 mbar = 1.0332 kgf/cm2 = 33.90 ftH2O

Properties of Saturated Steam

Pressure PSIGTemp *FTemp *CSaturated Liquid Btu/LbEvaporated Btu/Lb
0.0212100180970
1215102183968
3222105190964
5227108195960
8233112201956
10239115207953
12244118212949
15250121218945
18256124224941
20259126227939
25267131235933
30274134243929
35281138250924
40286141256920
45293145261914
50298148267912
55303151271909
60307153277906
65312156282901
70316158286898
80324162294891
90331166302886
100338170309880
110344173316875
120350177322871
130356180328866
140361183333861
150366186339857
160371188344853
180380193353845
200388198362837
250406208382820
300421216398805
350435224414790
400448231428777
450460238439766
500470243453751
600489254475728
700505263491710
800520271512686
900534279529666

For Reference Only