Notes

fundamental intro<br>
Hydraulic pipelines, simn are listed separately due to the fact that of the five major aspects (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipeline for liquid: GB8163-99

2. Seamless steel pipe for central heating boiler: GB3087-1999

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

4. High-pressure smooth steel pipes 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. Seamless steel pipeline for oil fracturing: GB9948-88.

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

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

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

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

Numerous alloy pipes 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are divided right into seamless steel pipelines and welded steel pipes according to different manufacturing processes. Smooth steel pipes are seamless steel pipelines made from steel ingots, pipe billets or steel rods perforated.

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

Benefits of hydraulic.

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

1. Different elements of hydraulic transmission can be comfortably as well as flexibly prepared according to demands.

2. Light weight, small dimension, little movement inertia and fast reaction speed.


3. Convenient operation and also control, which can realize stepless rate law in a vast range (rate guideline range approximately 2000:1).

4. The overload security can be understood immediately.

5. Usually, mineral oil is utilized as the functioning tool, the relative moving surface area can be lubricated by itself, and also the life span is long;.

6. It is very easy to recognize straight movement/.

7. It is very easy to recognize the automation of the machine. When the electro-hydraulic mixed control is embraced, not only a higher degree of automatic control procedure can be realized, yet also remote control can be understood.

Negative aspects of hydraulics.

1. As a result of the large liquid circulation resistance as well as leak, the efficiency is reduced. If not taken care of correctly, the leakage will not only infect the website, but might also cause fire and explosion crashes.

2. As the working performance is easily influenced by temperature modifications, it is not ideal to work under very high or extremely reduced temperature level conditions.

3. The production accuracy of hydraulic parts is high, so the price is a lot more costly.

4. Due to the leakage and also compressibility of the liquid tool, a strict transmission proportion can not be acquired.

5. It is difficult to learn the reason when the hydraulic transmission stops working; the use as well as upkeep call for a higher technological degree.

Port installation.

The tube should not be exceedingly bent when it is moving or at remainder, neither can it be curved at the root, but ought to start to bend at the very least 1.5 times its diameter;.

When the hose is transferred to a severe setting, it must not be pulled as well firmly, it should be loosened;.

Try to prevent torsional deformation of the hose;.

Keep the tube as far as possible from the warm emitting parts, and it is required to set up a heat shield;.

Stay clear of exterior damages to the hose, such as lasting rubbing externally of the same part throughout usage;.

There must be support parts if the tube's very own weight creates too much deformation.

Pipeline setup.

Prior to installation, all steel pipelines can be marinaded initially, particularly the steel pipes attached to the ferrule kind pipeline joints must be marinaded initially, and afterwards the ferrule is fastened to the pipeline end ahead of time;.

All pipe joints should be cleaned up with kerosene before setup, the O-rings inside need to be briefly gotten rid of for storage, as well as then put on after the formal installment;.

During construction, keep the oil ports, pipeline joints, pipe ends and other openings of pumps, distributors as well as other tools clean, and do not permit foreign things such as water and dirt to enter;.

The pipeline shall be stocked a totally free state, as well as the bonded pipe shall not be forcibly fixed and linked by using excessive radial force;.

The oil hole of the bearing seat should be checked in advance to see if the inner oil circuit is unblocked and also if the oil port thread matches the joint.

Pipe cleaning.

In order to make sure the tidiness of the lubrication system and also provide the bearings of mechanical equipment with clean grease, the pre-installed pipes have to be removed and also cleaned up. There are two sorts of cleaning: kerosene cleaning and pickling.

( 1) Items and also methods of kerosene cleaning.

Things. Copper pipelines, stainless-steel pipelines;.

method. 1. The steel pipelines that have actually been marinaded before pre-installation, and also the inner wall surface is devoid of rust and also iron range; 2. The pipeline joints that were soiled throughout the pre-installation; 3. Get rid of the pipelines and joints that require to be cleansed, as well as make use of cloth (( It is necessary not to shed woollen). Clean the within the tube with kerosene, soak both ends as well as joints in kerosene to clean, then coat the within the tube with engine oil or fill with oil, as well as seal both ends for installation; 4. After cleaning, there ought to be no noticeable impurities. (Such as iron filings, coarse pollutants, welding slag, and so on), pay unique attention to the welding slag on the internal wall of the weld must be completely cleaned up.

( 2) Marinading things and also methods.

Item. Steel pipes that have not been pickled before pre-installation; steel pipes that have been pickled however are now seriously worn away.

technique. 1. Utilize a degreasing representative to remove the oil adhering to the pipe; 2. Usage force sensors & load cells to eliminate the dirt on the pipeline; 3. Remove the rust spots on the pipe wall, rolled iron filings, and so on in the pickling remedy; 4. Wash with clean water For the add-ons produced in the above procedures, the within the pipe should be washed with high-pressure water; 5. Neutralize the acid remedy continuing to be on the pipe with lye; 6. In order to successfully dry the pipeline, the pipeline ought to be submersed in hot water or heavy steam dried out. Make the pipes dry; 7. Check the pickled pipes to see if they are clean; 8. Seal the opening of the pipeline with plastic or plastic tape promptly after pickling to avoid international matter and moisture from intruding [1]



The steel pipelines that have been marinaded before pre-installation, and also the internal wall surface is complimentary of corrosion and also iron scale; 2. Get rid of the pipes as well as joints that need to be cleansed, as well as make use of fabric (( It is essential not to shed woollen). Use clean water to remove the dirt on the pipeline; 3. Rinse with clean water For the attachments generated in the above operations, the within of the pipeline should be washed with high-pressure water; 5. In order to effectively dry out the pipe, the pipe must be immersed in hot water or steam dried out.

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