Notes

fundamental introduction<br>
Hydraulic pipelines, simn are noted individually as a result of the five significant aspects (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipeline for fluid: GB8163-99

2. Seamless steel pipeline for boiler: GB3087-1999

3. High pressure smooth pipe for central heating boiler: GB5310-95 (ST45.8- type).

4. High-pressure seamless steel pipes for plant food devices: GB6479-1999.

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

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

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

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

9. Smooth steel pipeline for car half shaft: GB3088-1999.

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

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

Different alloy pipes 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are divided right into smooth steel pipes and bonded steel pipelines according to various production processes. Seamless steel pipes are seamless steel pipes made from steel ingots, pipeline billets or steel poles perforated.

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

Benefits of hydraulic.

Contrasted with mechanical transmission as well as electric transmission, hydraulic transmission has the following benefits:.

1. Numerous parts of hydraulic transmission can be conveniently and also flexibly arranged according to needs.

2. Light weight, tiny dimension, little motion inertia and also fast reaction speed.

3. Practical procedure and also control, which can recognize stepless speed law in a wide variety (rate regulation variety as much as 2000:1).

4. The overload defense can be understood automatically.

5. Typically, mineral oil is made use of as the functioning medium, the relative relocating surface can be lubricated on its own, and also the solution life is long;.


6. It is very easy to recognize linear activity/.

7. It is very easy to realize the automation of the machine. When the electro-hydraulic consolidated control is adopted, not just a higher degree of automatic control procedure can be realized, yet also remote control can be realized.

Disadvantages of hydraulics.

1. Due to the large liquid flow resistance as well as leakage, the performance is reduced. Otherwise handled properly, the leakage will not just infect the website, yet might likewise create fire and explosion accidents.

2. As the working performance is conveniently influenced by temperature changes, it is not ideal to function under really high or very low temperature problems.

3. The production precision of hydraulic components is high, so the cost is much more pricey.

4. Due to the leak and compressibility of the liquid tool, a rigorous transmission ratio can not be gotten.

5. When the hydraulic transmission stops working; the use and also maintenance call for a greater technological degree, it is not easy to discover out the cause.

Port installation.

The hose pipe must not be excessively bent when it is moving or at remainder, neither can it be curved at the root, yet must begin to bend at the very least 1.5 times its size;.

When the hose is relocated to a severe position, it needs to not be pulled too snugly, it ought to be loosened;.

Attempt to prevent torsional deformation of the hose pipe;.

Keep the hose as away as feasible from the warmth emitting elements, and also it is required to set up a thermal barrier;.

Prevent exterior damages to the pipe, such as long-term rubbing on the surface of the same element throughout usage;.

If the hose pipe's very own weight triggers excessive deformation, there ought to be assistance parts.

Pipe setup.

Prior to installation, all steel pipes can be pickled first, particularly the steel pipelines linked to the ferrule kind pipe joints ought to be pickled first, and after that the ferrule is fastened to the pipe end in breakthrough;.

All pipeline joints must be cleaned with kerosene prior to setup, the O-rings inside must be temporarily eliminated for storage, and also after that place on after the formal installment;.

Throughout construction, keep the oil ports, pipe joints, pipeline ends and various other openings of pumps, representatives and various other equipment clean, and also do not permit international items such as water as well as dust to enter;.

The pipeline will be laid in a cost-free state, and also the welded pipe shall not be by force repaired and also attached by using extreme radial pressure;.

The oil opening of the bearing seat should be examined in breakthrough to see if the inner oil circuit is unblocked and if the oil port string matches the joint.

Pipe cleansing.

In order to make certain the cleanliness of the lubrication system as well as provide the bearings of mechanical equipment with clean oil, the pre-installed pipes must be eliminated and cleaned. There are two kinds of cleansing: kerosene cleaning and also pickling.

( 1) Items as well as techniques of kerosene cleansing.

Things. Copper pipes, stainless steel pipelines;.

approach. 1. hydraulic fittings and hoses that have actually been marinaded before pre-installation, as well as the internal wall is devoid of corrosion and also iron scale; 2. The pipe joints that were dirtied throughout the pre-installation; 3. Get rid of the pipes as well as joints that require to be cleaned up, and also make use of towel (( It is needed not to drop wool). Wipe the inside of the tube with kerosene, saturate both ends and also joints in kerosene to tidy, then coat the within the tube with engine oil or fill with oil, and seal both ends for installation; 4. After cleansing, there need to be no noticeable contaminants. (Such as iron filings, coarse pollutants, welding slag, and so on), pay unique interest to the welding slag on the internal wall of the weld need to be thoroughly cleaned.

( 2) Marinading approaches and also objects.

Object. Steel pipelines that have actually not been pickled before pre-installation; steel pipes that have been marinaded yet are now badly worn away.

Use clean water to eliminate the dirt on the pipe; 3. Rinse with tidy water For the add-ons produced in the above procedures, the within of the pipe must be cleaned with high-pressure water; 5. In order to efficiently dry out the pipeline, the pipeline needs to be immersed in hot water or steam dried.



The steel pipes that have actually been pickled before pre-installation, as well as the inner wall is free of rust and also iron range; 2. Remove the pipelines and joints that require to be cleansed, and also use towel (( It is required not to drop wool). Usage clean water to remove the dirt on the pipe; 3. Wash with clean water For the attachments produced in the above procedures, the inside of the pipe need to be cleaned with high-pressure water; 5. In order to efficiently dry out the pipeline, the pipe needs to be immersed in warm water or vapor dried.

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