Notes

fundamental intro<br>
Hydraulic pipelines, simn are detailed individually since of the five major components (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Smooth steel pipeline for fluid: GB8163-99

2. Seamless steel pipe for boiler: GB3087-1999

3. High stress seamless pipeline for central heating boiler: GB5310-95 (ST45.8- type).

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

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

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

7. Smooth steel pipeline for oil fracturing: GB9948-88.

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

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

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

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

Various alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are split into seamless steel pipes and also welded steel pipes according to various manufacturing procedures. Seamless steel pipelines are seamless steel pipelines made from steel ingots, pipe billets or steel poles perforated.

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

Advantages of hydraulic.

Compared to mechanical transmission and electrical transmission, hydraulic transmission has the following advantages:.

1. Different components of hydraulic transmission can be easily and also flexibly prepared according to demands.

2. Light weight, little size, little motion inertia and also rapid response rate.

3. Practical operation and also control, which can understand stepless speed guideline in a large range (rate law range approximately 2000:1).

4. The overload protection can be understood automatically.

5. Normally, mineral oil is utilized as the working medium, the family member relocating surface can be oiled on its own, and also the service life is long;.

6. It is simple to understand linear movement/.


7. It is very easy to realize the automation of the maker. When the electro-hydraulic mixed control is adopted, not just a higher degree of automated control procedure can be understood, yet likewise push-button control can be recognized.

Disadvantages of hydraulics.

1. Due to the large liquid circulation resistance and also leakage, the performance is low. Otherwise handled correctly, the leak will not only infect the website, yet might also cause fire as well as explosion mishaps.

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

3. The production precision of hydraulic elements is high, so the price is extra costly.

4. As a result of the leakage and also compressibility of the fluid tool, a strict transmission ratio can not be acquired.

5. It is not very easy to discover out the cause when the hydraulic transmission stops working; the usage and also maintenance require a greater technical degree.

Adapter installation.

The pipe needs to not be excessively bent when it is moving or at remainder, neither can it be bent at the origin, but need to start to bend a minimum of 1.5 times its size;.

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

Try to stay clear of torsional contortion of the hose pipe;.

Keep the tube as much away as possible from the heat emitting components, as well as it is necessary to mount a warmth shield;.

Avoid external damage to the tube, such as lasting rubbing externally of the exact same element throughout use;.

If the hose pipe's very own weight creates excessive deformation, there should be assistance parts.

Pipeline installment.

Before installment, all steel pipes can be marinaded initially, especially the steel pipelines attached to the ferrule kind pipeline joints need to be pickled first, and also after that the ferrule is fastened to the pipeline end in breakthrough;.

All pipeline joints must be cleansed with kerosene before installment, the O-rings inside ought to be briefly gotten rid of for storage space, and afterwards place on after the formal installment;.

Throughout construction, keep the oil ports, pipe joints, pipe ends and also various other openings of pumps, distributors as well as other devices clean, and also do not permit international items such as water and also dirt to go into;.

The pipeline will be stocked a complimentary state, as well as the welded pipeline shall not be forcibly repaired and linked by using excessive radial force;.

The oil opening of the bearing seat must be checked in breakthrough 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 make certain the cleanliness of the lubrication system and also supply the bearings of mechanical devices with tidy oil, the pre-installed pipelines need to be eliminated and also cleansed. There are 2 types of cleansing: kerosene cleaning as well as pickling.

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

Object. Copper pipes, stainless-steel pipes;.

The steel pipelines that have actually been pickled before pre-installation, as well as the internal wall surface is free of corrosion as well as iron range; 2. The pipeline joints that were dirtied during the pre-installation; 3. Eliminate the pipelines and also joints that need to be cleaned up, and use fabric (( It is essential not to drop wool).

( 2) Pickling methods and also things.

Object. Steel pipelines that have not been marinaded before pre-installation; steel pipes that have actually been marinaded however are now drastically corroded.

method. 1. Make use of a degreasing representative to remove the grease adhering to the pipe; 2. Usage tidy water to eliminate the dust on the pipe; 3. Get hydraulic hose fittings liujin of the rust spots on the pipe wall surface, rolled iron filings, etc in the pickling service; 4. Wash with tidy water For the accessories created in the above operations, the within the pipe ought to be cleaned with high-pressure water; 5. Neutralize the acid service remaining on the pipeline with lye; 6. In order to efficiently dry out the pipe, the pipeline ought to be immersed in warm water or heavy steam dried. Make the pipes dry; 7. Examine the pickled pipes to see if they are tidy; 8. Seal the opening of the pipe with plastic or plastic tape instantly after pickling to prevent international matter as well as moisture from intruding [1]



The steel pipelines that have been marinaded before pre-installation, and also the inner wall surface is free of rust and iron range; 2. Remove the pipelines and joints that need to be cleaned up, and also use fabric (( It is required not to drop wool). Use tidy water to remove the dust on the pipeline; 3. Wash with clean water For the attachments produced in the above operations, the inside of the pipe must be washed with high-pressure water; 5. In order to efficiently dry out the pipeline, the pipeline needs to be submersed in hot water or vapor dried.

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