Notes

standard intro<br>
Hydraulic pipelines, simn are noted separately since of the 5 significant components (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipe for liquid: GB8163-99

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

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

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

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


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

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

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

9. Smooth steel pipeline for automobile fifty percent shaft: GB3088-1999.

10. LIUJIN hydraulic hose fitting for ships: GB5312-1999.

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

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

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

Advantages of hydraulic.

Contrasted with mechanical transmission and also electric transmission, hydraulic transmission has the adhering to advantages:.

1. Different elements of hydraulic transmission can be comfortably and also flexibly set up according to demands.

2. Lightweight, little size, little movement inertia as well as rapid reaction speed.

3. Practical procedure as well as control, which can recognize stepless speed policy in a vast array (rate law variety up to 2000:1).

4. The overload protection can be understood immediately.

5. Generally, mineral oil is utilized as the functioning tool, the loved one relocating surface can be oiled on its own, as well as the life span is long;.

6. It is simple to realize direct movement/.

7. It is easy to recognize the automation of the device. When the electro-hydraulic combined control is adopted, not only a higher degree of automated control procedure can be understood, however also remote control can be realized.

Downsides of hydraulics.

1. Because of the big liquid circulation resistance as well as leakage, the effectiveness is low. Otherwise handled appropriately, the leakage will not only contaminate the website, but may additionally trigger fire and also explosion mishaps.

2. As the working efficiency is quickly influenced by temperature level modifications, it is not ideal to function under very high or really reduced temperature problems.

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

4. Because of the leak and compressibility of the fluid medium, a strict transmission proportion can not be obtained.

5. When the hydraulic transmission falls short; the usage and upkeep call for a higher technological degree, it is not simple to find out the cause.

Adapter installment.

The hose must not be exceedingly curved when it is moving or at rest, nor can it be bent at the origin, however should begin to flex at the very least 1.5 times its size;.

When the pipe is transferred to an extreme position, it should not be pulled also securely, it should be loose;.

Try to avoid torsional contortion of the hose;.

Maintain the tube as far away as possible from the warmth radiating elements, and it is essential to mount a heat shield;.

Prevent exterior damage to the hose pipe, such as lasting rubbing on the surface of the exact same part throughout use;.

There must be assistance parts if the hose pipe's own weight triggers excessive contortion.

Pipe setup.

Before installment, all steel pipelines can be pickled initially, specifically the steel pipes linked to the ferrule kind pipeline joints need to be marinaded first, and afterwards the ferrule is attached to the pipe end beforehand;.

All pipe joints should be cleansed with kerosene prior to setup, the O-rings inside need to be temporarily gotten rid of for storage, and after that place on after the official setup;.

Throughout building, keep the oil ports, pipeline joints, pipeline ends as well as other openings of pumps, representatives as well as various other equipment tidy, as well as do not enable foreign things such as water as well as dust to get in;.

The pipeline will be stocked a cost-free state, and also the bonded pipe shall not be forcibly repaired and linked by using extreme radial pressure;.

The oil opening of the bearing seat ought to be signed in advancement to see if the inner oil circuit is unblocked and if the oil port thread matches the joint.

Pipe cleaning.

In order to make certain the sanitation of the lubrication system as well as provide the bearings of mechanical tools with clean oil, the pre-installed pipes should be gotten rid of and cleansed. There are two kinds of cleansing: kerosene cleansing and pickling.

( 1) Items and also techniques of kerosene cleansing.

Things. Copper pipes, stainless-steel pipelines;.

technique. 1. The steel pipelines that have been pickled before pre-installation, and also the inner wall surface is complimentary of corrosion and also iron scale; 2. The pipe joints that were soiled throughout the pre-installation; 3. Remove the pipes as well as joints that need to be cleaned up, and also use towel (( It is required not to drop wool). Wipe the inside of television with kerosene, soak both ends and joints in kerosene to tidy, after that layer the within the tube with engine oil or loaded with oil, as well as seal both ends for installation; 4. After cleansing, there should be no noticeable contaminants. (Such as iron filings, coarse pollutants, welding slag, etc), pay unique attention to the welding slag on the inner wall of the weld have to be thoroughly cleaned up.

( 2) Marinading items as well as techniques.

Object. Steel pipelines that have actually not been pickled prior to pre-installation; steel pipes that have actually been marinaded but are now drastically corroded.

technique. 1. Utilize a degreasing representative to remove the grease adhering to the pipeline; 2. Usage tidy water to eliminate the dust on the pipe; 3. Eliminate the rust spots on the pipe wall, rolled iron filings, etc in the pickling remedy; 4. Rinse with clean water For the accessories produced in the above operations, the within the pipe must be washed with high-pressure water; 5. Counteract the acid service remaining on the pipeline with lye; 6. In order to successfully dry the pipeline, the pipeline must be submersed in hot water or steam dried. Make hose fittings connector dry; 7. Examine the pickled pipelines to see if they are clean; 8. Seal the opening of the pipe with plastic or plastic tape right away after marinading to stop foreign issue and moisture from intruding [1]



The steel pipelines that have been marinaded before pre-installation, and the internal wall surface is totally free of corrosion and also iron range; 2. Get rid of the pipes and joints that need to be cleaned, as well as make use of towel (( It is essential not to drop woollen). Usage tidy water to get rid of the dirt on the pipe; 3. Wash with tidy water For the accessories created in the above operations, the within of the pipe should be washed with high-pressure water; 5. In order to properly dry out the pipeline, the pipeline should be submersed in warm water or vapor dried.

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