Notes

fundamental introduction<br>
Hydraulic pipes, simn are detailed individually due to the fact that of the five significant elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Smooth steel pipe for liquid: GB8163-99

2. Seamless steel pipeline for boiler: GB3087-1999

3. High stress smooth pipeline for boiler: GB5310-95 (ST45.8- kind).

4. High-pressure seamless steel pipelines for plant food equipment: GB6479-1999.

5. Smooth steel pipeline for geological boring: YB235-70.

6. Smooth steel pipe for oil boring: YB528-65.

7. Smooth steel pipe for petroleum fracturing: GB9948-88.

8. Unique seamless pipeline for oil drill collar: YB691-70.

9. Seamless steel pipe for automobile fifty percent shaft: GB3088-1999.

10. Smooth steel pipe for ships: GB5312-1999.

11. Cold-drawn cold-rolled accuracy smooth steel pipe: GB3639-1999.

Various alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipelines are split into smooth steel pipes and also welded steel pipelines according to different manufacturing processes. Seamless steel pipes are smooth steel pipes made from steel ingots, pipeline billets or steel rods perforated.

Hydraulic pipeline weight formula: [( outer diameter-wall thickness) * wall surface density) * 0.02466= kg/m (weight per meter).

Benefits of hydraulic.

Compared to mechanical transmission and also electric transmission, hydraulic transmission has the adhering to benefits:.

1. Numerous elements of hydraulic transmission can be comfortably and flexibly set up according to needs.

2. Lightweight, little size, little movement inertia and also fast reaction rate.

3. Hassle-free operation and control, which can understand stepless rate regulation in a vast array (rate guideline variety as much as 2000:1).


4. The overload protection can be realized immediately.

5. Typically, mineral oil is used as the working tool, the relative relocating surface area can be lubricated by itself, and also the life span is long;.

6. It is easy to recognize direct motion/.

7. It is very easy to understand the automation of the equipment. When the electro-hydraulic consolidated control is taken on, not just a higher degree of automated control procedure can be understood, however also remote can be understood.

Negative aspects of hydraulics.

1. Because of the large fluid flow resistance as well as leak, the performance is low. If not dealt with correctly, the leak will certainly not just pollute the website, however might likewise cause fire and also explosion accidents.

2. As the working efficiency is easily affected by temperature level changes, it is not ideal to work under really low or really high temperature problems.

3. The production accuracy of hydraulic parts is high, so the cost is much more costly.

4. Due to the leakage and also compressibility of the fluid medium, a stringent transmission proportion can not be obtained.

5. When the hydraulic transmission stops working; the usage and maintenance need a higher technical level, it is not easy to locate out the reason.

Port installation.

The tube should not be excessively curved when it is moving or at rest, nor can it be bent at the origin, however should begin to flex a minimum of 1.5 times its size;.

When the tube is moved to an extreme placement, it ought to not be drawn also securely, it must be loose;.

Try to avoid torsional deformation of the pipe;.

Maintain the hose pipe as far as feasible from the warm emitting components, as well as it is needed to set up a thermal barrier;.

Prevent outside damages to the hose, such as lasting rubbing on the surface area of the same part throughout use;.

There ought to be assistance components if the pipe's very own weight triggers excessive contortion.

Pipe installment.

Prior to setup, all steel pipelines can be pickled first, particularly the steel pipes connected to the ferrule kind pipeline joints must be marinaded first, and afterwards the ferrule is fastened to the pipeline end ahead of time;.

All pipeline joints ought to be cleaned up with kerosene before installation, the O-rings inside must be momentarily gotten rid of for storage space, and after that put on after the official installation;.

Throughout building and construction, keep the oil ports, pipeline joints, pipeline ends as well as various other openings of pumps, distributors as well as other tools tidy, and also do not permit international things such as water and also dirt to go into;.

The pipeline will be stocked a cost-free state, and the welded pipe will not be by force taken care of and connected by using too much radial pressure;.

The oil opening of the bearing seat should be signed in advancement to see if the interior oil circuit is unblocked as well as if the oil port thread matches the joint.

Pipe cleansing.

In order to ensure the tidiness of the lubrication system as well as supply the bearings of mechanical devices with tidy grease, the pre-installed pipelines should be gotten rid of and cleaned. There are hydraulic saw hose fittings of cleaning: kerosene cleansing and pickling.

( 1) Things and also techniques of kerosene cleansing.

Object. Copper pipes, stainless-steel pipelines;.

method. 1. The steel pipelines that have been pickled before pre-installation, and the inner wall surface is devoid of rust and also iron range; 2. The pipeline joints that were soiled throughout the pre-installation; 3. Remove the pipelines and also joints that need to be cleansed, and use cloth (( It is required not to lose woollen). Wipe the within television with kerosene, saturate both ends as well as joints in kerosene to clean, after that coat the within the tube with engine oil or loaded with oil, and also seal both finishes for installment; 4. After cleaning, there must be no visible impurities. (Such as iron filings, coarse pollutants, welding slag, and so on), pay special interest to the welding slag on the inner wall surface of the weld have to be extensively cleansed.

( 2) Marinading things and also techniques.

Object. Steel pipes that have actually not been marinaded prior to pre-installation; steel pipes that have been pickled however are currently severely rusted.

Usage tidy water to remove the dust on the pipeline; 3. Rinse with tidy water For the accessories created in the above procedures, the within of the pipe should be washed with high-pressure water; 5. In order to successfully dry the pipe, the pipeline must be immersed in hot water or heavy steam dried.



The steel pipelines that have been pickled before pre-installation, and also the internal wall surface is cost-free of corrosion as well as iron scale; 2. Get rid of the pipes as well as joints that need to be cleansed, and also utilize fabric (( It is necessary not to lose wool). Use clean water to eliminate the dust on the pipe; 3. Rinse with clean water For the accessories generated in the above operations, the within of the pipe must be cleaned with high-pressure water; 5. In order to effectively dry out the pipeline, the pipe needs to be submersed in warm water or steam dried.

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