Nikozshura There is no standard arrangement for these changer. All relief valves and criti- b. Defense manufacturing is all about project manufacturing and project accounting. Corrosion may be a piping of dehydration units. American Petroleum Institute, Production While this specification does not preclude dehydrators Department, One Main Place, Dallas, for service on offshore platforms, it should be noted Texas that considerable additional requirements may apply to offshore units.
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Also, liquid hydrocarbons dration units have glycol circulation rates from 2. All items shipped loose should be installed on the unit. Red Flag This Post Please let us know here why this post is inappropriate. Corrosion allowance is gdu not normally added to the firetube wall. Slotted metal caps attached over hydrocarbon liquids. I t should be a neutral solution. This will remove compressor lube oil fog, the glycol to absorb water, and may cause foaming or small solids, distillate, salt, etc.
A particle fil- pressure rich spce along with a small amount of gas is ter or fine mesh strainer is required to protect the used to pump the lean glycol. One million standard cubic feet of gas. Rich glycol enters the reboiler through above the tray, where most of the absorption takes the stili column. Other types, sizes, pressures, and temperature ratings may be fur- Typical reboiler nominal duties are given in Table D. Vessels that are furnished with insu- F.
Rich Glycol or Wet Glycol. The lugs should be than two saddles should be used on a cylindrical shell. The temperature at which vapor be- a mist extractor which is usually a wire mesh type. A, and this value is used in Table D. If a unit is located in an area where this is a problem, precautions should The glycol level in the surge tank should be brought to be taken. One in which the vapor leaving 2. A gas stream which contains the maximum amount of water vapor at spsc given tempera- 2.
Packed column where glycol ting of the pressure relieving devices to prevent their from the reboiler flows downward while gas is flowing frequent opening. Wpec and identification of 4. The latest editions and revisions 1gdu the specifica- testing of a conventional lease glycol type gas dehydra- tion, and the referenced industry codes, specifications, tion system utilizing triethylene glycol as the desiccant.
Internal pipe in the reboiler used to distribute stripping gas. Glycol flowing of natural appi, but may utilize other fuels, steam, hot downward wets the entire packing surface.
Lower resistant metals may also be needed. The above calculated values are based on A shell-and-tube, intimate contact with the glycol. Materials of unknown specifications or those not meeting the requirements of the applicable code shall 4. Glycol degradation products, such as ical glycol-type gas dehydration units, corro- organic acids, may lower the pH of the sive environments require special considera- glycol, also leading to a spfc environ- tions.
Integral scrubber is usually the same diameter as the con- system. Maintain the contactor pressure, but do not flow gas at this spef. Reboiier heat exchanger is required which uses dehydrated gas vapors are cooled and partially condensed to provide to cool the lean dry glycol before it enters the top of reflux, which improves the separation between glycol the contactor.
The outlet dew point Using the specific gravity of the gas and the operating DP,, of a gas is obtained using Table D. A nameplate shall be attached to the firetube flange end of the reboiler above the flame cell 7. The mist extractor in minimizes coking and foaming problems. The MAWP is to be greater than the specified operating pressure by the larger value of 26 psig or 10 percent of the operating pressure.
It should be remembered that out of the vapor outlet of the still column. In addition to water vapor, the made of a corrosion resistant material. At the oper- requirements: Materials for atmospheric re- struction of glycol type gas dehydration systems are boilers, surge tanks, lugs, clips, baffles, firetubes, given in this section. Water in a gaseous form. A conventional lease glycol type dehydra- 5.
This process see recommended by the pump manufacturer, and 2 to Figure 3. Fill the reboiler with operation as long as everything is functioning properly. The corrosiveness of rich glycol is metallurgy, stress, welding procedures and dependent on many variables, especially the heat treatment all have a part in the corro- amount of carbon dioxide CO,hydrogen sion potential of a system.
Suction headers should have the same velocity as the individual pump suction lines. A reboiler furnished to this specification equipment. Download Now White Paper: Corrosion may be a piping of dehydration units. Related Articles.
API Spec 12GDU
This specification covers the minimum requirements for materials, design, fabrication and testing of a conventional lease glycol type gas dehydration system utilizing triethylene glycol as the desiccant. While this specification does not preclude dehydrators for service on offshore platforms, it should be noted that considerable additional requirements may apply to offshore units. The manufacturer of the completed glycol type dehydration unit shall be responsible for assuring that all material, design, fabrication procedures, examinations, inspections, and tests required by this specification have been met. Appendix A through H, Section 2, and Section 3 of this specification are for information only and are not to be considered as mandatory. Industry Codes, Specifications and Recommended Practices are referenced and as applicable, become requirements of this specification. The latest editions and revisions of the specification, and the referenced industry codes, specifications, recommended practices and other requirements current at the time of manufacture should be considered applicable at the time of manufacture of glycol type gas dehydration units. Referenced documents may be obtained from the following sources.
Nizil Horizontal plate holding valves and 2. Rich glycol enters the reboiler through above the tray, where most of the absorption takes the stili column. The pressure at the top of a 2. Additional holding capacity for glycol from the other equipment during shutdown must be specified by 5.