Notes

standard introduction<br>
Hydraulic pipelines, simn are provided separately due to the 5 major elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Smooth steel pipeline for liquid: GB8163-99

2. Smooth steel pipeline for boiler: GB3087-1999

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

4. High-pressure seamless steel pipes for plant food equipment: GB6479-1999.


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

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

7. Seamless steel pipeline for oil breaking: GB9948-88.

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

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

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

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

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

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

Advantages of hydraulic.

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

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

2. LIUJIN , little dimension, tiny activity inertia and also fast response rate.

3. Hassle-free operation and also control, which can understand stepless rate guideline in a wide variety (speed regulation array approximately 2000:1).

4. The overload protection can be understood automatically.

5. Usually, mineral oil is made use of as the working tool, the loved one relocating surface area can be lubricated by itself, and also the life span is long;.

6. It is very easy to realize linear activity/.

7. It is easy to understand the automation of the device. When the electro-hydraulic mixed control is embraced, not just a higher level of automated control procedure can be realized, yet likewise push-button control can be realized.

Downsides of hydraulics.

1. As a result of the big fluid flow resistance and also leakage, the efficiency is reduced. If not dealt with properly, the leakage will certainly not only contaminate the site, yet might likewise trigger fire as well as surge accidents.

2. As the working efficiency is conveniently influenced by temperature adjustments, it is not suitable to work under really high or very low temperature level conditions.

3. The manufacturing accuracy of hydraulic parts is high, so the rate is more expensive.

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

5. It is hard to discover the reason when the hydraulic transmission falls short; the use and also maintenance call for a greater technical degree.

Connector installation.

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

When the hose is relocated to a severe placement, it needs to not be drawn also securely, it needs to be loosened;.

Try to prevent torsional contortion of the tube;.

Maintain the hose pipe as far away as possible from the warmth radiating parts, and it is needed to mount a heat guard;.

Stay clear of external damages to the tube, such as lasting friction externally of the same component throughout use;.

There ought to be support components if the tube's own weight causes excessive deformation.

Pipeline installment.

Before setup, all steel pipelines can be pickled initially, especially the steel pipelines attached to the ferrule kind pipe joints should be marinaded initially, as well as then the ferrule is fastened to the pipeline end in breakthrough;.

All pipe joints need to be cleaned up with kerosene before setup, the O-rings inside must be temporarily eliminated for storage, and afterwards put on after the official setup;.

During building and construction, keep the oil ports, pipeline joints, pipeline ends and also various other openings of pumps, representatives as well as other tools clean, and do not enable international objects such as water and also dirt to get in;.

The pipe shall be stocked a totally free state, and the welded pipe will not be forcibly repaired as well as attached by applying extreme radial pressure;.

The oil opening of the bearing seat ought to be checked in development to see if the internal oil circuit is unblocked and also if the oil port thread matches the joint.

Pipeline cleansing.

In order to make sure the tidiness of the lubrication system as well as provide the bearings of mechanical devices with clean grease, the pre-installed pipes have to be eliminated and cleaned up. There are two kinds of cleansing: kerosene cleaning and pickling.

( 1) Objects and also techniques of kerosene cleaning.

Object. Copper pipelines, stainless steel pipes;.

approach. 1. The steel pipes that have actually been marinaded prior to pre-installation, and also the internal wall is without corrosion and iron scale; 2. The pipeline joints that were stained during the pre-installation; 3. Get rid of the pipelines as well as joints that require to be cleaned, and also make use of cloth (( It is required not to lose wool). Wipe the inside of the tube with kerosene, saturate both ends and also joints in kerosene to tidy, after that layer the inside of the tube with engine oil or fill with oil, and also seal both ends for installment; 4. After cleansing, there must be no noticeable impurities. (Such as iron filings, coarse impurities, welding slag, etc), pay special attention to the welding slag on the internal wall of the weld should be thoroughly cleaned up.

( 2) Marinading objects and also techniques.

Things. Steel pipes that have actually not been marinaded before pre-installation; steel pipes that have actually been marinaded however are now seriously corroded.

method. 1. Use a degreasing agent to eliminate the oil adhering to the pipe; 2. Usage clean water to eliminate the dirt on the pipeline; 3. Get rid of the corrosion areas on the pipe wall surface, rolled iron filings, and so on in the pickling solution; 4. Wash with clean water For the add-ons produced in the above operations, the within the pipeline must be cleaned with high-pressure water; 5. Neutralize the acid remedy staying on the pipeline with lye; 6. In order to efficiently dry the pipeline, the pipe must be immersed in warm water or steam dried. Make the pipes completely dry; 7. Check the pickled pipelines to see if they are clean; 8. Seal the opening of the pipeline with plastic or plastic tape quickly after marinading to avoid international issue and also moisture from intruding [1]



The steel pipes that have actually been marinaded before pre-installation, and also the inner wall is totally free of corrosion and iron range; 2. Get rid of the pipelines as well as joints that require to be cleaned up, as well as utilize cloth (( It is needed not to drop wool). Usage clean water to remove the dust on the pipeline; 3. Wash with tidy water For the add-ons created in the above procedures, the within of the pipe need to be cleaned with high-pressure water; 5. In order to properly dry the pipe, the pipe must be immersed in warm water or heavy steam dried.

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