What Is Process Piping?

Conveying pipeline refers to the pipeline that specializes in conveying liquid and gas materials. The method of conveying materials by pipeline is called pipeline transportation. It is a transportation mode that transports petroleum, coal and chemical products from the place of production to the market. Special components.

(1) According to the mode of operation, oil and gas pipelines can be divided into two categories:

One type is the pipelines that oil and gas fields or oil and gas processing and sales enterprises belong to, such as gathering and transportation pipelines in oil and gas fields, and oil refinery-owned pipelines. These pipes are generally short and have a small throughput.

The other is an independently operated long-distance oil and gas pipeline. For example, Luning oil pipelines, such pipelines generally have a large capacity, long distances, and various auxiliary supporting projects.

(2) According to the type of transmission medium, oil and gas pipelines can be divided into crude oil pipelines, natural gas pipelines, and oil and gas pipelines. West-East Gas Pipeline, etc. Refined oil pipelines,

(3) Classified according to the nature of the conveying medium, oil and gas pipelines can be divided into low-condensation, low-viscosity oil products pipelines and high-condensation, high-viscosity oil products pipelines.

(4) According to the classification of heating during transportation, oil and gas transportation pipelines can be divided into heated transportation pipelines and unheated transportation pipelines.

(5) According to the location of pipelines, oil and gas pipelines can be divided into land pipelines and subsea pipelines.

(6) Classified by pipeline laying method, oil and gas transportation pipelines can be divided into buried laying pipelines and overhead laying pipelines. ^[1]

A long-distance oil pipeline ranges from several hundred kilometers to as many as thousands of kilometers, or even tens of thousands of kilometers. It is a complex system project consisting of oil transmission stations, line projects, and auxiliary supporting projects, as shown in the figure below. .

(1) The installation method is the main consideration for a pipeline connection. The installation method chosen should be suitable for the design.

(2) The installation method depends on the availability of the installation vessel and installation equipment.

(3) the number and size of pipelines.

(4) The design pressure and temperature of the pipeline.

(5) The length of the pipeline or the span of the pipeline.

(6) Sea bottom conditions such as temperature, visibility, terrain and soil characteristics.

(7) displacement,

The installation of long-distance pipelines is as follows:

(1) Oil and gas pipeline projects located more than 25 km outside the area of the plant, mine, oil field (outside the regional boundary line), gas fields (outside the natural gas processing plant and the first gas transmission station), and the oil depot.

(2) Steel water pipeline project over 25km from the source of water to the first storage tank of the factory (city).

(3) A gas transmission pipeline project more than 25km from the gas plant to the city's first gas distribution station.

(4) Slurry pipeline engineering located outside the plant and mine treatment plant and at a distance of more than 25km.

(5) Crossing projects of rivers, highways, railways, optical cables, cables and other obstacles.

Steel-lined polyurethane wear-resistant pipeline is the ideal transportation pipeline in the liquid-solid, gas-solid, and two-phase flow transportation industry at home and abroad. The pipe is lined with a certain thickness of polyurethane anticorrosive and wear-resistant material on the inner surface of the metal pipe, so that it has the strength of the metal pipe and has excellent anti-corrosion and wear resistance.

The raw material of polyurethane is a material of active elastomer. After the stress is applied, the shape change of the polyurethane lags behind the time of stress application, thereby converting most of the scouring force generated by stress into internal energy and dissipating it as heat energy. The remaining small part of the scouring force bounces back to the conveying medium with the hysteresis deformation of the polyurethane to offset the subsequent stress scouring. Therefore, this characteristic of polyurethane uses clever use of force to greatly reduce the abrasion and erosion of the wear layer by the conveying medium, thereby achieving an unexpected durability effect. Many industry experts praise it as "Tai Chi" in the wear-resistant industry.

The application of carbon nanomaterials to polyurethane is an internationally leading commercial technology. The advantages and disadvantages of the two are complementary through a certain proportion and complex process. After several related simulation experiments and engineering use, carbon nano-urethane materials have been highly optimized in terms of various rational properties. In particular, the level of improvement in anti-aging performance is particularly outstanding. The aging rate of carbon nano-sized polyurethane materials does not exceed 0.26% within 50 years.

Widely used in metallurgical mine process pipelines, tailings transportation pipelines, coal washing, coal preparation plant technology pipelines, and coal gangue discharge transportation pipelines, long-distance transportation of finished coal slurry.