Notes

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

1. Seamless steel pipeline for liquid: GB8163-99

2. Smooth steel pipeline for boiler: GB3087-1999

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

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

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

6. Seamless steel pipe for oil drilling: YB528-65.

7. Seamless steel pipeline for petroleum breaking: GB9948-88.

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

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

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

11. Cold-drawn cold-rolled precision smooth steel pipeline: GB3639-1999.

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

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


Advantages of hydraulic.

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

1. Various components of hydraulic transmission can be comfortably and also flexibly organized according to requirements.

2. Lightweight, tiny dimension, small activity inertia and also quick response rate.

3. Convenient operation as well as control, which can realize stepless speed policy in a wide variety (rate regulation variety approximately 2000:1).

4. The overload security can be understood immediately.

5. Generally, mineral oil is utilized as the working medium, the relative relocating surface can be lubricated on its own, and also the service life is long;.

6. It is simple to realize straight motion/.

7. It is easy to realize the automation of the machine. When the electro-hydraulic mixed control is adopted, not just a higher level of automatic control procedure can be realized, but likewise remote control can be understood.

Downsides of hydraulics.

1. As load cell price of the large liquid flow resistance and leakage, the performance is reduced. Otherwise handled correctly, the leak will certainly not only contaminate the site, but might also cause fire and explosion crashes.

2. As the working efficiency is conveniently influenced by temperature modifications, it is not ideal to work under really high or extremely low temperature level problems.

3. The manufacturing precision of hydraulic parts is high, so the price is extra expensive.

4. Due to the leak and compressibility of the liquid medium, a stringent transmission proportion can not be obtained.

5. When the hydraulic transmission fails; the use and also upkeep need a higher technical level, it is not very easy to locate out the cause.

Port setup.

The hose must not be excessively curved when it is moving or at rest, neither can it be curved at the origin, however need to start to flex at the very least 1.5 times its size;.

When the pipe is transferred to an extreme setting, it ought to not be drawn too securely, it should hang;.

Attempt to avoid torsional contortion of the tube;.

Keep the hose as away as feasible from the heat emitting parts, as well as it is needed to set up a warmth guard;.

Stay clear of external damage to the tube, such as lasting friction externally of the same component throughout usage;.

There should be support parts if the pipe's own weight causes excessive deformation.

Pipeline installation.

Prior to installment, all steel pipelines can be marinaded initially, particularly the steel pipes attached to the ferrule kind pipeline joints should be marinaded first, and after that the ferrule is fastened to the pipe end in advance;.

All pipe joints must be cleaned up with kerosene before setup, the O-rings inside ought to be momentarily gotten rid of for storage, and afterwards place on after the official setup;.

During building and construction, maintain the oil ports, pipeline joints, pipe ends and other openings of pumps, distributors and other devices clean, as well as do not permit international items such as water as well as dust to get in;.

The pipeline shall be stocked a cost-free state, and the welded pipeline shall not be forcibly taken care of and also attached by applying excessive radial pressure;.

The oil hole of the bearing seat should be signed in breakthrough to see if the interior oil circuit is unblocked as well as if the oil port string matches the joint.

Pipeline cleansing.

In order to ensure the cleanliness of the lubrication system and also supply the bearings of mechanical tools with clean grease, the pre-installed pipelines have to be removed and also cleaned. There are two kinds of cleansing: kerosene cleaning and also pickling.

( 1) Things and also methods of kerosene cleansing.

Object. Copper pipelines, stainless-steel pipes;.

technique. 1. The steel pipes that have been pickled prior to pre-installation, as well as the inner wall is without rust and also iron scale; 2. The pipeline joints that were dirtied throughout the pre-installation; 3. Eliminate the pipes and joints that require to be cleaned up, and also make use of fabric (( It is necessary not to drop woollen). Clean the inside of television with kerosene, soak both ends and joints in kerosene to clean, after that coat the inside of television with engine oil or full of grease, as well as seal both ends for installation; 4. After cleansing, there ought to be no visible pollutants. (Such as iron filings, fibrous impurities, welding slag, etc), pay special attention to the welding slag on the inner wall of the weld should be extensively cleaned up.

( 2) Pickling items as well as approaches.

Things. Steel pipelines that have actually not been marinaded before pre-installation; steel pipelines that have been marinaded but are currently drastically corroded.

technique. 1. Make single point load cell of a degreasing representative to remove the grease adhering to the pipe; 2. Use clean water to remove the dirt on the pipeline; 3. Get rid of the rust areas on the pipe wall, rolled iron filings, etc in the pickling service; 4. Rinse with clean water For the add-ons created in the above procedures, the within the pipeline must be cleaned with high-pressure water; 5. Counteract the acid option staying on the pipeline with lye; 6. In order to efficiently dry out the pipe, the pipe must be immersed in warm water or vapor dried out. Make the pipes dry; 7. Examine the pickled pipelines to see if they are clean; 8. Seal the opening of the pipe with plastic or plastic tape quickly after pickling to stop foreign matter as well as dampness from intruding [1]



The steel pipes that have actually been marinaded prior to pre-installation, and also the internal wall surface is totally free of rust and iron scale; 2. Get rid of the pipelines and also joints that need to be cleaned, and use towel (( It is needed not to lose wool). Use clean water to get rid of the dirt on the pipeline; 3. Wash with clean water For the add-ons generated in the above procedures, the inside of the pipe ought to be washed with high-pressure water; 5. In order to successfully dry out the pipeline, the pipeline should be submersed in warm water or heavy steam dried out.

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