22-09-2012, 05:38 PM
CODES FOR VESSELS/HEAT EXCHANGERS
codes for vessels(46-51).ppt (Size: 500.5 KB / Downloads: 176)
History of pressure vessel codes\
Boiler explosion on March 20, 1905 in Brockton, Massachusetts.
58 killed and 117 injured.
Need of legislative rules and regulation for construction of boilers.
The first Boiler and Pressure Vessel Code was published in 1915.
Necessary changes made and new sections added as need arose.
What is a Code?
A code is a standard that has been adopted by one or more governmental bodies and has the force of law, or when it has been incorporated into a business contract.
Codes specify requirements of design, fabrication, inspection and testing of pressure vessels.
Number of national codes have been developed for pressure vessels by different countries.
In India, the code for pressure vessels is IS-2825
WHAT ARE ASME CODES?
It is a standard that provides rules for the design, fabrication, and inspection of boilers and pressure.
This establishes and maintains design, construction and inspection standards providing for maximum protection of life and property.
ASME Codes - Manufacturer
A manufacturer obtains permission to use one of the stamps through the ASME conformity assessment process.
The manufacturer’s quality control system is reviewed by an ASME team.
If it meets ASME requirements and the manufacturer successfully demonstrates implementation of the program, the manufacturer is accredited by ASME.
The manufacturer then may certify the product as meeting ASME standards and apply the stamp to the product.
Why follow ASME codes?
Excessive elastic deformation including elastic instability
Excessive plastic deformation
Brittle fracture
Stress rupture or creep deformation (inelastic)
Plastic instability and incremental collapse
High strain and low cycle fatigue
Stress corrosion
Corrosion fatigue