On May 1, 2014, the 4th Edition of API 682 mechanical seal standard was officially published. After nearly six years of intensive work, the API 682 4th edition includes numerous amendments and important innovations for the procurement and operation of seal and supply systems in the oil and gas sector, as well as the petrochemical industry.
The objective of API 682 is the continuous operation of the seal system for at least three years (25,000 operating hours subject to the legally stipulated emission values, or for max. "Screening Value" of 1000 ppm vol, EPA method 21), increased operational reliability, and simplified maintenance.
API 682 4th Edition Enhancements Include:
- Adaptation of pressure limits: 20 bar(g) Category 1, 40 bar(g) Category 2/3
- Detailed notes to "Engineered Seals"
- Combination of "Seal Types" in Arrangement 2/3
- Definition of vapor pressure margin
- Overview table of internal gap dimensions
- Selection SiC face material independent of category
- Optional bellows material Alloy 718 for metal bellows seals Type B
- Additional requirement for set screws for torque transmission
- New details to selection and operation of pressurized double seal systems
- Reduced minimum gap at the internal pumping device
Seal supply systems
- Transmitters instead of switches
- Alternative arrangement selection method on the basis of Risk & Hazard codes
- New API Plans 03, 55, 65A, 65B, 66A, 66B, 99
- Hydrostatic level detection for Plans 52, 53A
- Temperature measurement of gas bubble for Plan 53B
- 28-day refilling interval for barrier pressure systems
- Minimum pipe wall thicknesses of 2.5 mm for welded joints
- Temperature limits for instrumentation
API and EagleBurgmann
API standard mechanical seals and supply systems play an important role in the EagleBurgmann product portfolio. For more than 20 years, the company has been providing its know-how in further developing API specifications for the design of seal systems for the oil & gas and petrochemical sectors - and is active in the API 682 Task Force. Worldwide there are more than 21,000 EagleBurgmann API seal systems in use.
For more information on the API 682 4th Edition release or for additional downloads, click here.