Based on API Code, the definition of pipe is a pressure-tight cylinder used to convey a fluid or to transmit a fluid pressure.
If you look to the refinery or chemical plant, you can see the jungle of pipes which are connecting the vessels together. Statistic shows that 40 % of total mechanical failures in the units are因为的工艺管道。
Ťhis is the reason that in the ASME B31.3 code you cannot see the wording of “Authorized Inspector,” and instead the words “owner inspector” have been used.
该owner inspector can be the owner's own qualified inspector or the inspector of a third party inspection company under contract with the owner.
Contrary to the ASME B31.3, the ASME B31.1 code for power piping (boiler external piping) have the ASME stamp scheme. The construction contractor must be certified by the ASME organization and must hold the “PP” stamp.
What is In-Service Inspection Requirement for Process Piping?
为您的工艺管道的在役检查代码API STD 570。
Some of these Recommend Practices are:
API RP 574检查实践管道系统部件，
API RP 577 Welding Inspection and Metallurgy,
API RP 571损伤机制影响固定设备在炼油行业，
API 578 Material Verification Program for New and Existing Alloy Piping Systems
对于修复，API的要求STD 570，或ASME PCC-2需要得到满足。
该API 570 Piping Inspectors are qualified persons to do the piping system inspection.
该API 570 Training Courseis 6 daysvideo trainingprogram and available online and is the Prep course for API 570 Piping nspector Exam. Besides the student that successfully pass this training course exam, receive I4I academy certificate with 48 hours training credit.
What are the Important Items in the Piping Inspection?
External thickness measurement on CMLs on each piping circuit
Corrosion rate calculation based on metal loss in a specific time interval
用适当的ND做辅助检查E method for piping circuits susceptible to creep cracking
用适当的ND做辅助检查E method for piping circuits susceptible to the creep cracking
用适当的ND做辅助检查E method for piping circuits susceptible to environmental cracking from Chloride SCC, Polythionic acid SCC, Caustic SCC, Amine SCC, Carbonate SCC, Hydrogen blistering and hydrogen induced cracking (HIC), etc.
PEC (pulsed eddy current), LRUT (long range UT), LREM (long range electromagnetics), RT for wall thickness loss, and CUI and neutron backscatter and infra-red thermography for detection of wet insulation