To completely align API and ISO. , API Third Edition was issued in Since the publication of the Third Edition, seal technology has continued. APIs recent release of Standard Second Edition and the pending release of API Third Edition and ISO represent a major revision to this standard. ISO was finally published in February This article summarizes the development and changes in the 2nd Edition API until its launch in
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This leakage criterion does not apply to testing of dual gas seals or containment seals under failure conditions. There are three recommended seal categories:.
There are many annexes that include references, calculation techniques, and tutorial information. This design is used primarily on dual pressurized gas seals. There are three recommended seal categories: These datasheets are provided in both SI and U.
Each has a pressure limit: Here are the recommended metal components: Posted On February 14, When the inner seal fails, the containment seal is designed to run under full seal chamber conditions for a minimum of eight hours and prevent or minimize process fluid leakage to atmosphere.
Annex F — Mechanical seal data sheets One set of datasheets covers Category 1 and 2 seals. In the second and latter editions, there is an exemption for seal glands machined from is single piece of wrought material or bar stock.
The second position defines the arrangement and is designated as A1, A2, or A3.
МКС EN ISO 21049:2011
Mc Nally Institute menu O-ring selection Troubleshooting Section Technical paper index Pump and seal cheat sheets Sealing 2104 index Troubleshooting index Charts and graphs index Most asked questions, seals Chemical listing guide Glossary index. Here are some of the highlights of this standard: In addition, the measured wear on the seal faces must be less than 1 percent of the available wear.
All dimensions are in SI units with the US customary units given in parentheses. Standard flush plans and auxiliary hardware. Category Pumps and seals. Here are the recommended metal components:. The API standard was originally published in as a guide to selecting seals in the petroleum industry.
Arrangement 3 Two seals per cartridge assembly with an externally supplied higher pressure barrier fluid between the seals. Recommended seal selection procedures that are broken down into three process fluids: Here are two examples: The 12049 edition of the standard was finally published in February Categories Pumps and seals Posted On The third position defines the seal type and is designated as A, B, or C.
Thermosyphon Systems Api 682/Iso 21049 Bfs6000 Bfs 6000
Cast seal glands still require testing. It may also be 211049 on liquid or mixed phase applications. Each has a temperature range: Arrangement 2 Two seals per cartridge assembly with an externally supplied lower pressure buffer fluid between the seals.
Please note that this new standard does not cover the design of the seal components. Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons. Another set covers Category 3 seals.
That decision is left to the individual seal manufacturers.
GSO ISO – Standards Store – GCC Standardization Organization
Seal hydrostatic testing Hydrostatic testing is required for the seal gland, all piping, reservoirs, and other auxiliary equipment exposed to process fluids. The last position defines the piping plan s and is designated by the two-digit piping plan number. The recommended elastomers Secondary seals: Liquid buffer fluid Dual contacting wet seals. If more than one plan is required such as on dual sealsthe additional plans are added to the end of the code. During testing, the seals must maintain a leakage rate of less 210449 ppm as measured by EPA Method 21 or 5.