Should I choose coiled or straight composite pipes for gas stations? Different requirements for oil pipelines and oil and gas recovery pipelines

Should I choose coiled or straight composite pipes for gas stations? Direct answer: According to industry practices, coil pipes should be selected for oil pipeline installation, and straight pipes should be selected for oil and gas recovery pipelines. The reason is that the working conditions of the two types of pipelines are different: the oil pipeline runs liquid, and the advantages of continuous coil without joints and low flow resistance can be fully utilized; The oil and gas recovery pipe transports a mixture of oil and gas, requiring high precision in slope and layout. The straight pipe is easy to lay accurately according to the design slope and also ensures the direction of exhaust and condensate discharge. The on-site manifestation of the wrong selection is that the slope of the oil and gas recovery pipe is difficult to ensure and hidden dangers are difficult to identify. The division of labor for coil straight pipes is essentially determined by the medium and operating conditions.

Why is it advisable to use coiled tubing for oil transportation

The greatest value of a coil is having fewer joints. The path of the oil pipeline from the oil tank to the refueling machine is relatively fixed, with a coil laid from head to tail and no socket joints in between - each joint is a potential risk point and a resistance, one less is one. Another advantage of coils is installation efficiency: they can be continuously laid out and bent along the slope, much faster than connecting straight pipes one by one. The coil tube naturally bends within the turning radius, without stress concentration at the straight pipe bend.

Why is oil and gas recovery suitable for straight pipes

The requirements for slope in oil and gas recovery pipelines are almost strict - when the oil and gas mixture flows inside the pipeline, liquid accumulation at low points will form liquid resistance, directly dragging down the recovery efficiency. When laying straight pipes, the slope direction is clear and the elevation is controllable, and a level can be used to check each section step by step; The coil naturally bends more, the low point position is uncontrollable, and the accumulation point is hidden in the bend and cannot be seen. The recycling pipeline also has requirements for the direction of exhaust and condensate discharge, and the straight pipe layout makes these points predictable and detectable. In terms of working conditions, the combination of the diameter and wall thickness of the recycling tube is also more suitable for fixed length tubes.

Selection and Acceptance Points

1. Distinguish the specifications of oil pipelines and oil and gas recovery pipelines according to the design documents;
2. Priority should be given to coiled oil pipelines, and the continuous length should be checked to match the path;
3. Recycling pipes shall be laid in straight pipes according to the designed slope and reviewed section by section;
4. The storage and transportation requirements for the two types of pipes should be managed separately;
5. Upon arrival, verify the product identification and ensure that the specifications are consistent with the design;
6. Slope and layout are used as special confirmation items during acceptance.

Check the quantity separately

Do not count the quantity for acceptance. Checking product identification and design specifications, inspecting the appearance of pipes for transportation damage, and confirming storage conditions - these tasks are done once upon entry, which saves time compared to returning to the factory if problems are found during installation. The height of straight pipe stacking is controlled according to regulations, and there are also restrictions on the number of layers for coil stacking. If the crushed pipes are placed on the wall, it is a hidden danger.

Common mixed use issues

There are some convenient and mixed on-site drawings: recycling pipes are laid with coiled pipes, and the slope follows the edge; Or if the oil pipeline is connected to a pile of short joints to make up for the length, the number of joints will be out of control. The former poses a potential risk of liquid accumulation during operation, while the latter exponentially increases the risk points. The process of design changes cannot be skipped - the pipe shape has changed, and the slope calculation, bracket spacing, and exhaust and condensation point positions must also change accordingly, not just changing the material.

Is it really not possible to use a coil as a recycling pipe?

It's not absolutely impossible, but the uncontrollable slope and low point will make it difficult to manage liquid resistance hazards; If necessary, measure the elevation section by section and reserve drainage points.

Is it necessary to connect the coil if the length is not enough?

Can be connected, but each joint must be constructed and recorded according to the electric melting process; When designing the path, try to choose specifications with continuous length coverage to reduce joints.

Can two types of pipes be stored together?

Can be stored together, but must follow the regulations: avoid direct sunlight, keep away from heat sources, prevent sharp objects, control stacking height, clearly label to avoid mixing.

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.