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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Arrangement 3 Two seals per cartridge assembly with an externally supplied higher pressure barrier fluid between the seals. Liquid buffer fluid Dual contacting wet seals. This leakage criterion does not apply to testing of isp gas seals or containment seals under failure conditions.
ISO – Pumps. Shaft sealing systems for centrifugal and rotary pumps
There are many annexes that include references, calculation techniques, and tutorial information. Here are the recommended metal components: There are three recommended seal categories:. Annex F — Ieo seal data sheets One set of datasheets covers Category 1 and 2 seals. Each has a temperature range: Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons. Please note that this new standard does not cover the design of the seal components. Is 2 Two seals per cartridge assembly with an externally supplied lower pressure buffer fluid between the seals.
API (3RD EDITION) AND ISO STANDARD – Mc Nally Institute
The API standard was originally published in as a guide to selecting seals in the petroleum industry. These datasheets are provided in both SI 221049 U. Category Pumps and seals. The third edition of the standard was finally published in February The last position defines the piping plan s and is designated by the two-digit piping plan number. Here are two examples: There are three recommended seal categories: In the second and latter editions, there is an exemption for seal glands machined from a single piece of wrought material or bar stock.
If more than one plan is required such as on dual sealsthe additional plans are added to the end of the code. Standard 210049 plans and auxiliary hardware.
The second position defines the arrangement and is designated as A1, A2, or A3. 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.
It may also be used on liquid or mixed phase applications. Cast seal glands still require testing.
МКС EN ISO 21049:2011
Recommended seal selection procedures that are broken down into three process fluids: In addition, the measured wear on the seal faces must be less than 1 percent of the available wear. The third position defines the seal type and is designated as A, B, or C.
This design is used primarily on dual pressurized gas seals. That decision is left to the individual seal manufacturers. Posted On February 14, Here are the recommended metal components:. All dimensions are in SI units with the US customary units given in parentheses.
Each has a pressure limit: Categories Pumps and seals Posted On