1. PRESSURE EQUIPMENT REPAIRS API 510/570 and ASME PCC-2 are both PCCs
Repairs can be to either the original construction code OR a Post-Construction code (PCC)
API 510
/570/653
ASME
PCC-2
API 510/570 and ASME PCC-2 are both PCCs
API 510
/570/653

2. API CODES ANS ASME PCC-2 HAVE SOME DIFFERENT PRINCIPLES
Post construction code
API 570:Pipework
API 510:Vessels
API 653:Storage tanks
These define various types of repair as either temporary or permanent
This contains more detailed instructions but doesn’t define any technique as temporary or permanent. You decide.

3. API Definitions for piping repairs TEMPORARY PERMANENT
Excavate and blend in/repair
Full split sleeve or fillet-welded patch
Flush insert patch
Weld
overlay

4. API TEMPORARY REPAIRS HAVE RESTRICTIONS Sleeve or fillet-welded repair
The base (and repair) material must have a UTS of less than 40ksi(275.8 MPA)

5. THERE ARE ALWAYS RESTRICTIONS ON PATCH SPACING
Minimum
toe-toe spacing is specified to limit HAZ interaction

6. ASME PCC-2 gives repair design methods
It also covers non-welding (composite) and mechanical clamps
ASME
PCC-2
API 510
/570/653