ASME PCC-2-2022 Pressure Equipment and Piping Repair

The "ASME PCC-2-2022 Pressure equipment and piping repair" standard, developed by the American National Standards Institute (ANSI), describes methods for repairing equipment, pipelines and related auxiliary equipment within the scope of "ASME Pressure technology codes and standards" after they are placed into service. These repair methods include relevant design, manufacturing, inspection and testing practices and can be temporary or permanent depending on the conditions.

The methods provided in this standard address the repair of components when repair is deemed necessary based on appropriate inspection and defect assessment. These inspection and defect assessment methods are not addressed in this standard, but are addressed in other post-construction codes and standards.

This standard is not intended to address all safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to determine appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

Only technical procedures and information are provided in this standard; administrative or policy requirements are outside the scope of this standard.

Essentially, this standard is divided into five parts:

• Part 1 covers organization and purpose and is applicable to all clauses in this standard.
• Section 2 covers repair methods and techniques that involve the use of welding, brazing, soldering or other methods involving metal deposition.
• Section 3 covers mechanical repairs with or without sealant, such as bolted clamps or fixtures, and includes all repair methods not covered in Section 2 or Section 4.
• Section 4 covers repairs by non-metallic means, e.g. bonding, including non-metallic liners and dressings, and bonding of metallic components (e.g. epoxy bonding).
• Chapter 5 covers examination and testing methods and techniques.

This standard provides technical information, procedures, and recommendations for repair methods that are recognized by consensus and generally accepted as good engineering practices. In cases where equipment repair is subject to jurisdictional regulation, jurisdictional approvals may be required.

For example, the subheadings of the first three chapters include:

• Part 1 Scope, organization and purpose
  • Article 101 Introduction
• Part 2 Welded repairs
  • Article 201 Butt-welded insert plates on pressure components
  • Article 202 External welding to repair internal thinning
  • Article 203 Seal-welded threaded connections and seal-welded repairs
  • Article 204 Repair of welded leak box
  • Article 205 Weld ring seals (welded lip seals)
  • Article 206 Full circumference steel reinforcement sleeves for piping
  • Article 207 Reinforcement plug welded fillet welded patches
  • Article 208 Alternatives to conventional welding preheating
  • Article 209 Alternatives to post-weld heat treatment
  • Article 210 In-service welding of carbon steel pressure components or pipelines
  • Mandatory annex 210-I In-service welding procedure/welder performance qualification setting
  • Article 211 Welding, weld coating and coating repair
  • Article 212 Corner welded patches
  • Article 213 Repairs of threaded or welded plugs
  • Article 214 Field heat treatment of containers
  • Mandatory annex 214-I Heat treatment procedure development
  • Mandatory annex 214-II Typical hot box design
  • Article 215 Repair welding considerations for chromium-molybdenum steel pressure vessels
  • Article 216 Hot welded joints in pressure equipment or pipelines
  • Non-mandatory appendix 216-A Glossary of abbreviations
  • Article 217. Welding of seals for leaky water systems
• Chapter 3 Mechanical repairs
  • Article 301 Replacement of pressure components
  • Article 302 Freezing plugs
  • Article 303 Damaged threads in threaded holes
  • Mandatory supplement 303-I Recommended detail for changing stud threads to prevent damage to threaded holes
  • Mandatory annex 303-II An illustrative example showing an engineering analysis for widening a threaded hole
  • Article 304 Fault excavation and weld repair
  • Mandatory Annex 304-I Metal extraction process
  • Article 305 Flange repair and transformation
  • Article 306 Repair of mechanical clamps
  • Article 307 Pipe straightening or alignment bending
  • Article 308 Damaged anchors in concrete (post-installed mechanical anchors)
  • Article 309 Pressure seal type bonnet valves
  • Article 310 Hot bolting
  • Article 311 Hot and half bolting disassembly procedures
  • Article 312 Inspection and repair of shell and tube heat exchangers
  • Mandatory annex 312-I Methods for determining the minimum number of cylinders to be inspected
  • Mandatory annex 312-II Inspection of pressure holding components
  • Article 313 Compression of metallic pipes

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