What are the conditions on the site before the installation of the composite pipe? Pre-construction inspection list
Release date: 2026-10-22
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What are the conditions for the site before the installation of the composite pipe? Direct answer: according to the construction specification, at least ten items-the oil tank is installed and backfilled to the neck line of the tank mouth; The welding of manhole cover opening and connecting piece is completed; The connecting piece between manhole well and oil tank is installed. Excavation of pipe trench and backfill the cushion according to the correct slope; The location of the refueling island and the type of refueling machine are determined; Stop work before the installation of canopy and steel structure or pipeline backfilling; Erecoil in the work area; clearing of construction equipment and materials; removal of fuel in the area; intact arrival of pipe products and inspection tools in place. If the conditions are not met, start work, and every subsequent process is paying debts to the front.
Civil and tank conditions
The first four items are all about civil engineering and tanks. If the oil tank is not backfilled in place, the manhole cover cannot be opened. If the manhole connector is not installed, there will be no reference plane for pipeline docking. The cushion and slope of the pipe trench are the lifeline of the composite pipe-the slope is wrong, the refueling island and the oil tank behind it are wrong, and the renovation cost is calculated by meters. The most common problem at this stage is the construction period for civil engineering and installation: the cushion layer has just been laid on the pipe, the settlement eats up the slope, and the whole line is reworked during acceptance. It is more useful to tell the order to death during technical disclosure than to quarrel afterwards.
| Category | Prerequisites | Check points | Responsible party |
|---|---|---|---|
| Tank body | Tank backfill to neck line | Check elevation according to the drawing | Civil engineering |
| Tank body | Completion of welding of manhole opening | Attachment in place | Install |
| Trench | Excavation and Bedding Slope | Level recheck | Civil engineering |
| Architecture | Canopy steel structure or stop installation | Clear operation surface | General contract |
| Safety | Wall Marker Clearance | Fuel removal | Site |
| Materials | Product arrival tools in place | Quantity Specification Appearance | Construction |
Working surface and safety conditions
The middle four pipe working surface and safety. If the canopy is not completely installed, either the pipe will be laid after the installation is completed, or the hoisting operation will be suspended in the pipeline area-a bolt dropped on the pipe is a pit. Temporary fences and safety signs keep idlers out, and the gas station site is adjacent to the road. This is not a form. Clearing the site should be thorough: the steel plate and wood are not clear, and it is impossible to prevent collision and damage. The residual fuel in the area shall be managed according to the fire and flammable environment, and the construction shall not be started until the concentration drops.
Material and tool conditions
- Check the quantity and specification of pipe fittings on arrival, and ensure that the appearance is intact;
- Special tools such as electric fusion welding machine are in place and verified;
- Cutting, scraping and cleaning tools and consumables are available;
- The testing instrument is within the validity period of calibration;
- Completion of technical disclosure for operators;
- Ten preconditions are ticked one by one, and no work is started for the missing items.
This tool is the easiest to despise.
Tools are the most easily despised. The welding machine is not checked, the scraper is not sharp, the cleaning agent is not right, the joint made looks the same, and the service life is poor. It is better to make the tool check into a fixed action before starting work than to try luck in the quality of the joint. The list of pre-conditions shall be countersigned by both the construction and the site, and the responsibilities for missing items shall be clearly defined on the spot.
How to use the list
The value of the list of installation preconditions is in the action of "tick one by one" itself. The countersigned list is included in the completion data, and the construction conditions are traced back to the pipeline problems in the future. This is the first-hand material. Electronizing the list, with photos of the scene attached to each item, is more convincing than a piece of signature paper. The new project feels cumbersome when used for the first time, but cannot be separated from the third time-it changes "should be no problem" into "confirmed one by one".
Can we do one of the poor preconditions first?
Not recommended. The preconditions bite each other, and the rework cost of missing items is much greater than waiting; if there are special arrangements, the responsibilities and remedial measures shall be clearly defined in writing.
Where is the list kept after countersigning?
With the completion data archived, the electronic version is attached with site photos; it is the proof of construction conditions, but also the basis for future traceability.
What if the pipe is found damaged at the scene?
Separate storage and identification, contact the supplier for disposal; Damaged pipes are not allowed to be installed, do not repair will be used.
This article is organized by Luoyang wohong petrochemical equipment co., ltd. the company provides design, manufacture, installation, commissioning and operation and maintenance services for oil and gas recovery equipment, solvent recovery devices and buried composite pipe networks at gas stations, oil depots and chemical enterprises. if you need scheme configuration or on-site investigation, please contact and exchange.
