What is 10 13 rule in heat exchanger?
Increase the shell-side design pressure up to 10/13 of the tube-side design pressure. (The logic behind this “10/13” rule is that the hydrotest is done, as per ASME, at 1.3-times the design pressure—it was popularly known as the ⅔ rule based on old code hydrotest pressure before the year 2000).
What is standard for heat exchanger?
Boilers and heat exchangersIncluding steam pressure vessels
| Standard and/or project(12) | Stage |
|---|---|
| ISO 6758:1980 Welded steel tubes for heat exchangers | 90.93 |
| ISO 6759:1980 Seamless steel tubes for heat exchangers | 90.60 |
| ISO 12211:2012 Petroleum, petrochemical and natural gas industries — Spiral plate heat exchangers | 90.93 |
How many tubes can a heat exchanger have?
waste heat boiler in power plant gas turbine are shell & tube type heat exchanger are also larger size and having 5000-12000 number of tubes.
What is tube rupture case?
Abstract. One fault that occurs with heat exchangers is a tube rupture, an overpressure scenario in which high pressure fluid flows into the low pressure region. It is a serious safety concern that may lead to significant damage.
What is 2/3 rule in heat exchanger?
The “two-thirds rule” from API RP 521 states: For relatively low-pressure equipment, complete tube failure is not a viable contingency when the design pressure of the low-pressure side is equal to or greater than two-thirds the design pressure of the high-pressure side.
What is hairpin in heat exchanger?
Hairpin heat exchangers use true counter-current flow. Unlike multi-pass shell and tube designs where correction factors are used to account for inefficiencies resulting from co-current passes, this process maximizes temperature differences between shell- and tube-side fluids.
What is a 1/2 heat exchanger?
Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell. In a single pass heat exchanger, the fluid goes in one end of each tube and out the other.
Which 10/13 rule should I use for my heat exchanger?
For exchangers designed and fabricated according to the current code, you use a 10/13 rule (100/130). To determine which rule applies, pull the U-1 report for the exchanger, or check the nameplate, to see which hydro-test pressure was used. The apply the applicable rule.
When to ignore the tube rupture case in pressure exchanger?
For exchanger where the low pressure side design pressure is. at least two-third(or 10/13 from our senior engineer. ) of the high pressure side design pressure, the tube rupture case can be ignored if the upstream and downstream. equipment in the pressure system is capable of handling the high side pressure.
How do I determine which hydro-test pressure for my exchanger?
For exchangers designed and fabricated according to the current code, you use a 10/13 rule (100/130). To determine which rule applies, pull the U-1 report for the exchanger, or check the nameplate, to see which hydro-test pressure was used.
Can PSV be installed on low pressure side of heat exchanger?
And, relief device may not be installed on the low pressure side of the heat exchanger. a valid case. it a valid factor? at relief conditions. So is it preferable to located the PSV on the upstream side?