ISO 21049 PDF

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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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. Posted On February 14, The third position defines the seal type and is designated as A, B, or C.

If more than one plan is required such as on ieo sealsthe additional plans are added to the end of the code. Each has a pressure limit: Annex F — Mechanical seal data sheets One set of datasheets covers Category 1 and 2 seals.

Recommended seal selection procedures that are broken down into three process fluids: Here are the recommended metal components: Seal hydrostatic testing Hydrostatic testing is required for the seal gland, all piping, reservoirs, and other auxiliary equipment exposed to process fluids.


Mc Nally Institute menu O-ring selection Troubleshooting Section Technical paper index Pump and seal cheat sheets Sealing chemicals index Troubleshooting index Charts and graphs index Most asked questions, seals Chemical listing guide Glossary index. That decision is left to the individual seal manufacturers.

МКС EN ISO 21049:2011

This design is used primarily on dual pressurized gas seals. Iwo third edition of the standard was finally published in February In the second and latter editions, there is an exemption for seal glands machined from a single piece of wrought material or bar stock. These datasheets are provided in both SI and U.

There are three recommended seal categories: Here 210499 two 221049 The recommended elastomers Secondary seals: Each has a temperature range: Please note that this new standard does not cover the design of the seal components. Cast seal glands still require testing. Another set covers Category 3 seals. All dimensions are in SI units with the US customary units given in parentheses. Arrangement 2 Two seals per cartridge assembly with an externally supplied lower pressure buffer fluid between the seals.

GSO ISO – Standards Store – GCC Standardization Organization

In addition, the measured wear on the seal faces must be less than 1 percent of the available wear. During testing, the seals must maintain a leakage rate of less than ppm as measured by EPA Method 21 or 5. The API standard was originally published in as a guide to selecting seals in the petroleum industry. Liquid buffer fluid Dual contacting wet seals. This leakage criterion does not apply to testing of dual gas seals or containment seals under failure conditions.


Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons. Arrangement 3 Two seals per cartridge assembly with an externally supplied higher pressure barrier fluid between the seals. Standard flush plans and auxiliary hardware.

Categories Pumps and seals Posted On Category Pumps and seals. Here are some of the highlights of this standard: The last position defines the piping plan s and is designated by the two-digit piping plan number. Here are the recommended metal components:.

There are many annexes that include references, calculation techniques, and tutorial information. There are three recommended seal categories:. It may also be used on liquid or mixed phase applications.