Notes

basic intro<br>
Hydraulic pipes, simn are provided separately due to the five major components (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipeline for fluid: GB8163-99

2. Smooth steel pipeline for boiler: GB3087-1999

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

4. High-pressure smooth steel pipes for fertilizer devices: GB6479-1999.

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

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

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

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

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

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

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

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

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

Advantages of hydraulic.

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

1. Numerous components of hydraulic transmission can be comfortably and flexibly organized according to needs.

2. Light weight, little dimension, tiny activity inertia as well as fast reaction rate.

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

4. The overload security can be realized instantly.

5. Typically, mineral oil is used as the working tool, the family member moving surface area can be lubricated by itself, as well as the life span is long;.

6. It is very easy to understand direct activity/.

7. It is very easy to realize the automation of the device. When the electro-hydraulic mixed control is embraced, not just a greater degree of automatic control procedure can be realized, but likewise remote control can be understood.

Downsides of hydraulics.

1. As a result of the big fluid circulation resistance and also leakage, the performance is low. Otherwise taken care of appropriately, the leak will certainly not just contaminate the site, but may likewise trigger fire and also explosion crashes.

2. As the working performance is quickly impacted by temperature changes, it is not appropriate to work under very high or extremely reduced temperature conditions.

3. The production precision of hydraulic parts is high, so the cost is extra expensive.

4. Due to the leakage as well as compressibility of the fluid tool, a stringent transmission ratio can not be acquired.

5. It is not easy to figure out the reason when the hydraulic transmission fails; the use and maintenance need a greater technological degree.

Connector installation.

The hose needs to not be exceedingly curved when it is moving or at remainder, neither can it be curved at the origin, yet should start to flex a minimum of 1.5 times its size;.

When the hose pipe is relocated to a severe setting, it needs to not be pulled as well securely, it should hang;.

Try to avoid torsional contortion of the tube;.

Maintain the hose as far as feasible from the warmth radiating components, as well as it is needed to set up a warmth guard;.

Stay clear of outside damage to the pipe, such as lasting rubbing on the surface area of the exact same part during usage;.

If the hose pipe's own weight causes excessive deformation, there must be support components.

Pipe setup.

Prior to installation, all steel pipes can be marinaded initially, specifically the steel pipelines connected to the ferrule kind pipeline joints need to be marinaded initially, and afterwards the ferrule is secured to the pipe end beforehand;.

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

Throughout building, keep the oil ports, pipeline joints, pipe ends and also various other openings of pumps, suppliers and also other devices clean, and also do not permit foreign items such as water as well as dirt to enter;.

The pipeline will be stocked a free state, and the bonded pipeline will not be by force fixed as well as linked by using too much radial pressure;.


The oil opening of the bearing seat must be examined in development to see if the inner oil circuit is unblocked and if the oil port thread matches the joint.

Pipe cleaning.

In order to make sure the sanitation of the lubrication system as well as provide the bearings of mechanical tools with tidy grease, the pre-installed pipes should be removed and also cleaned up. There are LIUJIN hydraulic hose fitting of cleaning: kerosene cleansing and pickling.

( 1) Items and also methods of kerosene cleaning.

Item. Copper pipelines, stainless steel pipelines;.

approach. 1. The steel pipes that have actually been pickled prior to pre-installation, as well as the internal wall surface is without rust and iron range; 2. The pipe joints that were dirtied throughout the pre-installation; 3. Remove the pipes as well as joints that need to be cleansed, and also make use of cloth (( It is required not to shed woollen). Wipe the within the tube with kerosene, soak both ends and joints in kerosene to clean, after that layer the inside of the tube with engine oil or fill with oil, and seal both ends for installation; 4. After cleansing, there should be no visible impurities. (Such as iron filings, fibrous impurities, welding slag, and so on), pay special attention to the welding slag on the inner wall surface of the weld must be extensively cleaned up.

( 2) Marinading items and also approaches.

Item. Steel pipes that have not been marinaded before pre-installation; steel pipelines that have actually been marinaded but are now significantly worn away.

approach. 1. Make use of a degreasing representative to eliminate the grease adhering to the pipe; 2. Use clean water to get rid of the dirt on the pipeline; 3. Remove the corrosion spots on the pipeline wall surface, rolled iron filings, etc in the pickling option; 4. Wash with clean water For the accessories produced in the above operations, the inside of the pipe must be washed with high-pressure water; 5. Reduce the effects of the acid option staying on the pipe with lye; 6. In order to successfully dry out the pipeline, the pipeline must be immersed in hot water or steam dried out. Make the pipes completely dry; 7. Check the pickled pipes to see if they are clean; 8. Seal the opening of the pipe with plastic or plastic tape immediately after marinading to avoid contaminant and also wetness from intruding [1]



The steel pipes that have been marinaded prior to pre-installation, and the inner wall is complimentary of corrosion as well as iron scale; 2. Eliminate the pipelines and also joints that need to be cleaned, as well as use cloth (( It is needed not to shed wool). Usage tidy water to eliminate the dust on the pipe; 3. Wash with clean water For the accessories created in the above operations, the inside of the pipe ought to be washed with high-pressure water; 5. In order to efficiently dry out the pipe, the pipe needs to be immersed in hot water or vapor dried.

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