XXH vs XXS Pipe

Double Extra Heavy (XXH) and Double Extra Strong (XXS) are pipe designations, referring to their wall thickness, often considered equivalent in the pipe industry. The terminology can vary depending on the standards followed. Both types have extremely thick walls for greater pressure handling capacities, making them ideal for high-pressure applications. While presenting improved corrosion resistance, these pipe schedules come with increased weight, posing challenges in installation. They are less commonly in demand and may not be easily available. Additionally, their production involves more material, leading to a relatively higher cost compared to standard pipes. However, specifics can differ by manufacturers, necessitating verification from product specifications.


Comparison Point XXH XXS
Meaning Double Extra Heavy (Denomination can vary depending upon the standards followed)
Double Extra Strong (Denomination can vary depending upon the standards followed)
Wall Thickness XXH pipes have an extremely thick wall
XXS pipes also have an extremely thick wall
Pressure Rating Can handle very high pressure due to thicker walls
Can handle very high pressure due to thicker walls
Application Although usage can vary, commonly used in industries that require high pressures
Although usage can vary, commonly used in industries that require high pressures
Availability May not always be easily available due to their specific use
May not always be easily available due to their specific use
Cost Generally higher due to more material usage in manufacturing
Generally higher due to more material usage in manufacturing
Installation Due to heavy weight, installation process can be challenging
Due to heavy weight, installation process can be challenging
Demand Generally lower than standard schedule pipes due to specific application nature
Generally lower than standard schedule pipes due to specific application nature
Corrosion More resistant due to thicker wall material but depending on material used
More resistant due to thicker wall material but depending on material used
Weight Heavier due to increased wall thickness
Heavier due to increased wall thickness

Difference in Dimension/Size chart/Thickness/Weight of XXH and XXS are as following

1.) Double Extra Strong (XXH)
Nominal Size
(IPS)
Diameter External
(Inches)
Diameter Internal
(Inches)
Wall Thickness
(Inches)
Weight Per Foot Plain Ends
(Pounds)
Internal Area
(Sq. In.)
GPM at 10 ft/sec
(Velocity)
1/2".840.252.2941.714.0501.6
3/4"1.050.434.3082.440.1484.6
1"1.315.599.3583.659.2828.8
1-1/4"1.660.896.3825.214.63019.6
1-1/2"1.9001.100.4006.408.95029.6
2"2.3751.503.4369.0291.77455.3
2-1/2"2.8751.771.55213.702.46476.8
3"3.5002.300.60018.584.155129.0
3-1/2"4.0002.728.63622.855.845182.0
4"4.5003.152.67427.547.803243.0
5"5.5634.063.75038.5512.97404.0
6"6.6254.897.86453.1618.84587.0
2.) Double Extra Strong (XXS)
Nominal size [inches]Outside diameter [inches]Outside diameter [mm]Wall thickness [inches]Wall thickness [mm]Weight [lb/ft]Weight [kg/m]
3/4" NPS201.0526.70.3087.822.443.64
1" NPS251.31533.40.3589.093.665.45
1 1/4" NPS321.6642.20.3829.75.217.77
1 1/2" NPS401.948.30.410.156.419.56
2" NPS502.37560.30.43611.079.0313.44
2" 1/2 NPS652.875730.55214.0213.6920.39
3" NPS803.588.90.615.2418.5827.68
4" NPS1004.5114.30.67417.1227.5441.03
5" NPS1255.563141.30.7519.0538.5557.43
6" NPS1506.625168.30.86421.9553.1679.22
8" NPS2008.625219.10.87522.2372.42107.92
10" NPS25010.75273125.4104.13155.15
12" NPS30012.75323.8125.4125.49186.97
14" NPS35014355.6125.4138.84206.83
16" NPS40016406.4125.4160.2238.64
18" NPS45018457125.4181.56270.34
20" NPS50020508125.4202.92302.28
22" NPS55022559125.4224.28334.23
24" NPS60024610125.4245.64366.17
26" NPS65026660125.4267397.49
28" NPS70028711125.4288.36429.44
30" NPS75030762125.4309.72461.38
32" NPS80032813125.4331.08493.32
34" NPS85034864125.4352.44525.27
36" NPS90036914125.4373.8556.59
38" NPS95038965125.4395.16588.53
40" NPS1000401016125.4416.52620.48
42" NPS1050421066.8125.4437.88652.42
44" NPS1100441117.6125.4459.24684.37
46" NPS1150461168.4125.4480.6715.68
48" NPS1200481219.2125.4501.96747.63
52" NPS1300521320.8125.4544.68811.52
56" NPS1400561422.4125.4587.4874.48
60" NPS1500601524125.4630.12938.67
64" NPS1600641625.6125.4672.841002.56
68" NPS1700681727.2125.4715.561065.82
72" NPS1800721828.8125.4758.281129.69

Application of XXH and XXS Pipes/Tube

Aerospace

Cleaning Factories

Food Processing

Food Processing

Oil and Gas

Oil and Gas

Pharmaceutical

Pharmaceutical

Power Plant

Power Plant

Ship Building

Ship Building

Water Systems

Water Systems

Refinery

Refinery