What is the level of detail for the three checks and four determinations? ?
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The hydraulic testing has now begun on some sections of the newly constructed facility. I would like to ask experienced colleagues: to what extent should the \"three inspections and four verifications\" be carried out before the hydraulic testing? ? For example, before a hydrostatic test, certain valves, flow meters, thermometers, pressure gauges, blind flanges, etc. are not installed – so how am I supposed to fill out my three-inspections-four-verifications form? It’s still better to use the table from before the hydrostatic test; once gas-tightness testing begins, conduct another round of the three checks and four verifications for a thorough inspection. It seems there’s a problem of repetitive work, but otherwise, there’s still a long time left before the hydrostatic test and the airtightness check, and it’s not possible to be sure that there are no issues with the pipelines How did everyone solve it? ? This post was last edited by Pacific on 2008-9-2 16:19]
Generally, the three inspections and four determinations need to be carried out several times, taking 1 to 2 months.
It’s about checking the last terms, over and over again; usually 3-5 checks are needed to eliminate them all. Gaskets, bolts, pipe supports, valves, and so on – it generally depends on the construction team. With a high-quality team, you’ll need to check less often; with a low-quality team, there will be losses and theft, so you’d better prepare to buy another pair of shoes. This post was last edited by ranqi on 2008-9-1 15:53.]
Please refer to What is the “three inspections and four determinations” during construction? Request the specific inspection details for the three checks and four determinations of various types of equipment
Although it’s not what I need, I still appreciate your participation. I would like to ask how many times the three checks and four confirmations usually need to be carried out, and how one can avoid repeating work while still doing a good job!
“The “three inspections” refer to checking for design omissions, identifying potential issues in construction quality, and examining unfinished work. “The “four fixations” refer to determining tasks for the issues identified during inspections, identifying the units and personnel responsible for handling them, specifying the measures to be taken, and setting deadlines for making corrections.
I think the process of three inspections and four confirmations is inherently a tedious task; it’s impossible to complete it all in one go. As for reducing repetitive work, it’s necessary to analyze each situation on its own. For example, certain steps that need to be carried out before a hydrostatic test may not have any impact after the test is completed, in which case the review of those steps can be reduced later. Quality and safety require repeated inspections and checks in order to be ensured properly
The three inspections and four determinations are a precursor to starting work; no matter how much effort is required at this stage, it is worth it. It is the last chance to rectify issues, and if care is not taken at this time, mistakes will arise once work begins
Doing it a few more times can’t hurt; after all, the project is one-time only, and having a good project to call one’s own is also a form of success
For the three checks and four determinations, must the design unit be involved? It’s not clearly specified in the contract, but the client is asking us to go – can I refuse? **Are there any relevant regulations?
There’s no need for that; here we follow the three inspections and four confirmations process, and we’ve never seen design involvement in it. It’s a joint inspection carried out by four parties: the construction party, the general contractor, the supervisor, and the owner. If any issues are found, bring them up to the design team!