Regular inspection of pressure pipelines within the installed device after delivery
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As is well known, many individuals or construction firms that operate under licensed qualifications engage in widespread fraud when it comes to the inspection of pressure pipes. If significant discrepancies are found during subsequent regular inspections compared to the original test results, 1. What is the interval for regular inspections and what is the proportion of pipes that need to be inspected? 2. Is there a difference between GC1 and GC2? 3. If it is found that the flaw detection results do not match those from that time, what extent of risk do the construction unit and the flaw detection agency at that time bear? Thank you to all fellow sailors:handshake
1. The inspection cycle and the proportion of pipes to be inspected are determined based on the usage conditions and requirements of different pipelines. Generally, the inspection cycle for pressure pipelines is 1–5 years, and the proportion of pipes to be inspected should be 10%-20% or more of all the pipelines. 2. GC1 and GC2 refer to two levels of flaw detection for pressure pipelines; GC1 represents a higher level of detection and is suitable for important pipelines and critical sections ； GC2 is a standard-level inspection method, suitable for ordinary pipelines and typical pipe sections. 3. If, during subsequent regular inspections, it is found that there is a significant difference between the inspection results and those from the initial tests, both the construction unit and the inspection agency responsible at that time shall bear certain responsibilities and risks, including issues related to breach of contract and liability for compensation. It is necessary to determine the extent of responsibility and risk based on the specific circumstances and evidence. .
1. Different issuing authorities: GC1: The license is issued by the **General Administration of Quality Supervision, Inspection and Quarantine to entities that have passed the evaluation. GC2: It is the Provincial General Administration for Quality Supervision, Inspection and Quarantine that grants operating permits to entities that have passed the evaluation. 2. Different classifications: Among those transported by GC1, GB5044 and HG20660, the toxicity levels of the media in the pipelines are as follows: highly hazardous media (except benzene) ； Highly hazardous gas media (including benzene) ； Highly hazardous liquid media with working temperatures above the standard boiling point. GC2 pipes for transporting flammable fluid media and toxic fluid media, with a design pressure of less than 4.0 MPa and a design temperature of 400 degrees Celsius or higher ； Pipelines for transporting non-flammable fluid media and non-toxic fluid media, with a design pressure of less than 10.0 MPa and a design temperature of 400 degrees Celsius or higher