Notes

basic introduction<br>
Hydraulic pipelines, simn are provided independently due to the five significant components (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Smooth steel pipe for liquid: GB8163-99

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

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

4. High-pressure seamless steel pipelines for fertilizer devices: GB6479-1999.

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

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

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

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

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

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

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

Various alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipelines are separated right into smooth steel pipelines as well as bonded steel pipes according to different manufacturing procedures. Seamless steel pipes are smooth steel pipes 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).

Benefits of hydraulic.

Compared to mechanical transmission as well as electric transmission, hydraulic transmission has the complying with advantages:.

1. Different parts of hydraulic transmission can be comfortably as well as flexibly set up according to demands.

2. Lightweight, small dimension, little activity inertia and also quick reaction rate.

3. Hassle-free procedure and control, which can realize stepless rate guideline in a wide variety (rate policy array as much as 2000:1).

4. The overload protection can be realized instantly.

5. Normally, mineral oil is utilized as the functioning tool, the family member relocating surface can be lubricated on its own, and the life span is long;.

6. It is simple to recognize linear motion/.

7. It is simple to realize the automation of the equipment. When the electro-hydraulic consolidated control is adopted, not just a higher degree of automatic control process can be understood, however likewise remote control can be recognized.

Disadvantages of hydraulics.

1. Because of the huge liquid circulation resistance and also leak, the effectiveness is reduced. Otherwise taken care of appropriately, the leak will not just pollute the website, yet may also cause fire and explosion mishaps.

2. As hydraulic fittings adapters working performance is easily impacted by temperature level modifications, it is not ideal to work under extremely reduced or really high temperature problems.

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

4. Because of the leakage as well as compressibility of the liquid medium, a stringent transmission ratio can not be acquired.

5. It is challenging to figure out the reason when the hydraulic transmission stops working; the use and also upkeep call for a higher technological degree.

Adapter setup.

The pipe ought to not be exceedingly bent when it is moving or at remainder, nor can it be bent at the root, yet ought to start to bend at the very least 1.5 times its diameter;.

When the tube is relocated to a severe position, it must not be pulled also tightly, it needs to hang;.

Try to stay clear of torsional contortion of the tube;.

Keep the tube as far as feasible from the warm radiating parts, and it is essential to set up a warm shield;.

Prevent exterior damage to the pipe, such as lasting friction on the surface of the exact same element throughout use;.

There must be support components if the hose's own weight causes too much contortion.

Pipe setup.

Before installment, all steel pipelines can be marinaded first, particularly the steel pipes connected to the ferrule kind pipeline joints ought to be marinaded first, as well as then the ferrule is fastened to the pipeline end beforehand;.

All pipe joints should be cleansed with kerosene before setup, the O-rings inside ought to be temporarily removed for storage, and afterwards place on after the official setup;.

During building, keep the oil ports, pipe joints, pipe ends and other openings of pumps, representatives as well as other devices tidy, as well as do not permit foreign objects such as water and also dust to enter;.


The pipe will be laid in a complimentary state, as well as the welded pipe will not be forcibly repaired as well as linked by applying extreme radial pressure;.

The oil opening of the bearing seat should be inspected in advance to see if the inner oil circuit is unblocked and if the oil port string matches the joint.

Pipeline cleansing.

In order to make sure the cleanliness of the lubrication system and provide the bearings of mechanical equipment with tidy oil, the pre-installed pipes have to be removed as well as cleansed. There are two sorts of cleaning: kerosene cleaning as well as pickling.

( 1) Objects as well as techniques of kerosene cleansing.

Item. Copper pipelines, stainless-steel pipelines;.

The steel pipes that have actually been marinaded prior to pre-installation, and also the inner wall surface is free of corrosion as well as iron range; 2. The pipeline joints that were soiled throughout the pre-installation; 3. Eliminate the pipelines as well as joints that require to be cleaned up, and also use towel (( It is necessary not to lose wool).

( 2) Marinading objects and approaches.

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

approach. 1. Make use of a degreasing agent to remove the oil adhering to the pipeline; 2. Usage tidy water to remove the dust on the pipe; 3. Get rid of the corrosion spots on the pipe wall, rolled iron filings, and so on in the pickling option; 4. Rinse with tidy water For the attachments created in the above procedures, the inside of the pipe should be cleaned with high-pressure water; 5. Counteract the acid solution remaining on the pipe with lye; 6. In order to properly dry out the pipeline, the pipe needs to be immersed in warm water or steam dried out. Make the pipes dry; 7. Inspect the pickled pipes to see if they are tidy; 8. Seal the opening of the pipe with plastic or plastic tape immediately after pickling to stop international issue and dampness from intruding [1]



The steel pipelines that have actually been marinaded prior to pre-installation, as well as the internal wall is totally free of rust as well as iron scale; 2. Remove the pipes as well as joints that need to be cleaned up, and also utilize fabric (( It is needed not to shed woollen). Use clean water to remove the dust on the pipe; 3. Rinse with clean water For the accessories created in the above operations, the inside of the pipe should be cleaned with high-pressure water; 5. In order to successfully dry out the pipe, the pipe should be submersed in warm water or heavy steam dried.

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