Notes

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

1. Smooth steel pipeline for liquid: GB8163-99

2. Smooth steel pipeline for central heating boiler: GB3087-1999

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

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

5. Smooth steel pipe for geological boring: YB235-70.

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

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

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

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

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

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

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

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

Advantages of hydraulic.

Contrasted with mechanical transmission and also electrical transmission, hydraulic transmission has the following benefits:.

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

2. Lightweight, small dimension, small motion inertia and quick response rate.

3. bspt hydraulic adapter as well as control, which can realize stepless speed law in a wide array (rate policy variety approximately 2000:1).

4. The overload defense can be realized instantly.

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

6. It is easy to realize straight motion/.

7. It is easy to recognize the automation of the equipment. When the electro-hydraulic combined control is embraced, not only a greater level of automated control process can be recognized, however additionally remote can be recognized.

Negative aspects of hydraulics.

1. As a result of the big fluid circulation resistance and also leak, the efficiency is reduced. Otherwise handled appropriately, the leak will certainly not just infect the site, yet may also create fire as well as surge crashes.

2. As the functioning efficiency is conveniently impacted by temperature level modifications, it is not ideal to function under really high or extremely reduced temperature level problems.

3. The manufacturing precision of hydraulic components is high, so the price is much more expensive.

4. As a result of the leakage as well as compressibility of the fluid medium, a stringent transmission ratio can not be acquired.


5. When the hydraulic transmission fails; the use and maintenance require a greater technological level, it is not simple to discover out the reason.

Adapter installation.

The hose ought to not be exceedingly bent when it is moving or at remainder, nor can it be curved at the origin, but should start to flex a minimum of 1.5 times its size;.

When the pipe is transferred to a severe position, it should not be drawn too tightly, it ought to hang;.

Attempt to prevent torsional contortion of the tube;.

Maintain the hose pipe as much away as possible from the warm radiating components, and it is necessary to set up a heat shield;.

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

There ought to be assistance parts if the pipe's own weight triggers excessive contortion.

Pipeline installation.

Prior to setup, all steel pipelines can be pickled first, especially the steel pipelines linked to the ferrule type pipeline joints must be marinaded first, and afterwards the ferrule is secured to the pipe end ahead of time;.

All pipeline joints must be cleansed with kerosene prior to installment, the O-rings inside ought to be momentarily eliminated for storage space, and afterwards place on after the formal installation;.

During construction, keep the oil ports, pipe joints, pipe ends as well as other openings of pumps, representatives and other devices clean, and do not permit international things such as water and dust to go into;.

The pipe will be stocked a cost-free state, as well as the bonded pipeline will not be by force dealt with and also attached by applying extreme radial force;.

The oil hole of the bearing seat must be checked in advancement to see if the inner oil circuit is unblocked as well as if the oil port thread matches the joint.

Pipeline cleaning.

In order to ensure the sanitation of the lubrication system as well as supply the bearings of mechanical devices with tidy oil, the pre-installed pipes must be eliminated and also cleaned. There are two kinds of cleaning: kerosene cleaning and pickling.

( 1) Things and also techniques of kerosene cleaning.

Things. Copper pipelines, stainless-steel pipes;.

method. 1. The steel pipelines that have actually been marinaded before pre-installation, as well as the inner wall is totally free of corrosion and also iron scale; 2. The pipe joints that were dirtied during the pre-installation; 3. Remove the pipelines and also joints that need to be cleaned, as well as utilize fabric (( It is needed not to lose woollen). Wipe the inside of the tube with kerosene, saturate both ends and joints in kerosene to tidy, after that coat the within television with engine oil or fill with oil, as well as seal both finishes for setup; 4. After cleansing, there need to be no noticeable contaminants. (Such as iron filings, coarse pollutants, welding slag, etc), pay special focus to the welding slag on the internal wall of the weld must be completely cleaned.

( 2) Pickling techniques and also objects.

Item. Steel pipelines that have actually not been pickled prior to pre-installation; steel pipes that have been marinaded however are now drastically rusted.

technique. 1. Utilize a degreasing agent to get rid of the grease sticking to the pipeline; 2. Use tidy water to get rid of the dust on the pipe; 3. Eliminate the corrosion areas on the pipeline wall surface, rolled iron filings, etc in the pickling option; 4. Wash with tidy water For the add-ons created in the above procedures, the within of the pipeline must be cleaned with high-pressure water; 5. Neutralize the acid service staying on the pipeline with lye; 6. In order to efficiently dry out the pipeline, the pipe must be immersed in warm water or heavy steam dried. Make the pipelines dry; 7. Examine the pickled pipes to see if they are tidy; 8. Seal the opening of the pipeline with plastic or plastic tape right away after marinading to avoid contaminant and also moisture from intruding [1]



The steel pipelines that have actually been pickled prior to pre-installation, and also the inner wall is complimentary of corrosion and iron scale; 2. Get rid of the pipelines and joints that require to be cleansed, as well as make use of fabric (( It is required not to lose wool). Use tidy water to eliminate the dust on the pipe; 3. Rinse with clean water For the attachments produced in the above procedures, the within of the pipe need to be cleaned with high-pressure water; 5. In order to efficiently dry the pipeline, the pipeline needs to be submersed in warm water or steam dried out.

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