Notes

basic intro<br>
Hydraulic pipelines, simn are detailed separately since of the five major 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 pressure smooth pipe for boiler: GB5310-95 (ST45.8- type).

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

5. hydraulic hose fitting for geological boring: YB235-70.

6. Seamless steel pipeline for oil exploration: YB528-65.

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

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

9. Seamless steel pipeline for vehicle half shaft: GB3088-1999.

10. Seamless steel pipeline for ships: GB5312-1999.

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

Various alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are separated right into smooth steel pipes and also bonded steel pipes according to different production procedures. Smooth steel pipelines are seamless steel pipes made from steel ingots, pipeline billets or steel poles perforated.

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

Advantages of hydraulic.

Compared to mechanical transmission as well as electric transmission, hydraulic transmission has the following benefits:.

1. Various parts of hydraulic transmission can be conveniently as well as flexibly organized according to demands.

2. Lightweight, tiny dimension, little motion inertia and fast reaction rate.

3. Hassle-free procedure as well as control, which can realize stepless speed regulation in a large range (rate law range up to 2000:1).

4. The overload security can be recognized instantly.

5. Generally, mineral oil is used as the working tool, the family member moving surface can be lubricated on its own, as well as the life span is long;.

6. It is easy to realize direct movement/.

7. It is simple to recognize the automation of the maker. When the electro-hydraulic mixed control is adopted, not just a greater degree of automated control process can be recognized, yet likewise push-button control can be realized.

Negative aspects of hydraulics.

1. As a result of the large fluid flow resistance and also leak, the effectiveness is low. If not handled correctly, stainless hose fittings will not only pollute the website, but may also trigger fire and also explosion mishaps.

2. As the functioning performance is conveniently influenced by temperature level adjustments, it is not ideal to work under extremely low or very high temperature level problems.

3. The manufacturing precision of hydraulic parts is high, so the cost is much more costly.

4. As a result of the leak and compressibility of the liquid medium, a rigorous transmission ratio can not be gotten.

5. It is challenging to locate out the reason when the hydraulic transmission falls short; the usage and maintenance call for a greater technological level.

Port installment.

The hose must not be exceedingly curved when it is relocating or at remainder, neither can it be bent at the root, however must begin to bend a minimum of 1.5 times its diameter;.

When the hose is relocated to an extreme position, it must not be pulled also firmly, it needs to be loosened;.

Attempt to avoid torsional deformation of the pipe;.

Keep the hose as far as feasible from the warmth radiating components, and it is essential to mount a warmth guard;.

Stay clear of exterior damage to the tube, such as long-lasting rubbing on the surface area of the very same element during usage;.

If the hose's own weight creates excessive deformation, there need to be support components.

Pipe installment.

Prior to installment, all steel pipelines can be marinaded first, particularly the steel pipelines attached to the ferrule type pipe joints must be pickled first, as well as then the ferrule is secured to the pipe end in development;.

All pipe joints need to be cleansed with kerosene prior to setup, the O-rings inside must be temporarily eliminated for storage space, and after that place on after the formal setup;.

During building, keep the oil ports, pipeline joints, pipe ends and other openings of pumps, representatives as well as various other equipment tidy, and also do not enable foreign things such as water and dirt to go into;.

The pipe will be stocked a totally free state, and the welded pipeline shall not be forcibly fixed and linked by using too much radial force;.

The oil hole of the bearing seat must be inspected in breakthrough to see if the internal oil circuit is unblocked and also if the oil port thread matches the joint.

Pipe cleansing.

In order to ensure the sanitation of the lubrication system and supply the bearings of mechanical equipment with clean oil, the pre-installed pipelines must be eliminated and also cleansed. There are 2 kinds of cleansing: kerosene cleaning as well as pickling.

( 1) Objects and also methods of kerosene cleansing.

Object. Copper pipelines, stainless steel pipelines;.

technique. 1. The steel pipelines that have actually been pickled prior to pre-installation, and also the inner wall surface is devoid of rust and also iron scale; 2. The pipeline joints that were dirtied during the pre-installation; 3. Eliminate the pipelines as well as joints that require to be cleaned, as well as make use of towel (( It is needed not to shed woollen). Wipe the within the tube with kerosene, saturate both ends as well as joints in kerosene to tidy, after that coat the inside of television with engine oil or loaded with oil, and seal both ends for setup; 4. After cleaning, there must be no visible impurities. (Such as iron filings, coarse contaminations, welding slag, etc), pay special attention to the welding slag on the inner wall surface of the weld must be thoroughly cleaned.


( 2) Marinading things and approaches.

Things. Steel pipelines that have not been marinaded before pre-installation; steel pipes that have actually been pickled however are currently badly corroded.

Use tidy water to get rid of the dirt on the pipeline; 3. Rinse with clean water For the accessories created in the above procedures, the inside of the pipeline must be washed with high-pressure water; 5. In order to properly dry out the pipe, the pipe should be submersed in warm water or heavy steam dried.



The steel pipes that have been marinaded before pre-installation, and the internal wall is cost-free of corrosion and iron range; 2. Remove the pipelines and also joints that require to be cleaned, and also utilize cloth (( It is required not to drop woollen). Usage tidy water to remove the dirt on the pipe; 3. Wash with tidy water For the add-ons produced in the above procedures, the inside of the pipe ought to be washed with high-pressure water; 5. In order to efficiently dry out the pipeline, the pipeline should be submersed in hot water or heavy steam dried out.

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