Notes

basic introduction<br>
Hydraulic pipelines, simn are detailed independently due to the 5 significant elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Smooth steel pipe for liquid: 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 seamless steel pipelines for plant food tools: GB6479-1999.

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

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

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

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

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

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

11. http://www.liujin-fittings.com/1BT9-20L150-china-products-bsp-Stainless-steel-or-carbon-steel-hydraulic-fitting-pd41826763.html -drawn cold-rolled accuracy smooth steel pipe: GB3639-1999.

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

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

Advantages of hydraulic.

Compared to mechanical transmission as well as electrical transmission, hydraulic transmission has the complying with benefits:.

1. Numerous parts of hydraulic transmission can be comfortably as well as flexibly organized according to demands.

2. Light weight, tiny size, little motion inertia and rapid reaction speed.

3. Practical procedure and control, which can realize stepless rate guideline in a wide variety (rate law array approximately 2000:1).

4. The overload defense can be recognized automatically.

5. Generally, mineral oil is used as the working medium, the relative moving surface area can be lubricated by itself, as well as the life span is long;.

6. It is simple to recognize direct movement/.

7. It is simple to realize the automation of the device. When the electro-hydraulic mixed control is adopted, not only a greater level of automatic control process can be recognized, but also remote control can be understood.

Drawbacks of hydraulics.

1. As a result of the large liquid circulation resistance and leakage, the effectiveness is reduced. If not managed appropriately, the leakage will certainly not just infect the site, however may also create fire and also surge mishaps.

2. As LIUJIN hydraulic hose fitting working efficiency is quickly impacted by temperature adjustments, it is not appropriate to function under very low or very high temperature level conditions.

3. The production accuracy of hydraulic parts is high, so the price is extra pricey.

4. Because of the leakage and also compressibility of the fluid tool, a stringent transmission ratio can not be gotten.

5. It is challenging to learn the reason when the hydraulic transmission fails; the usage and also upkeep require a higher technological degree.

Connector setup.

The hose must not be excessively bent when it is moving or at remainder, neither can it be curved at the root, yet need to start to flex at the very least 1.5 times its size;.

When the tube is relocated to a severe placement, it needs to not be pulled as well snugly, it needs to be loose;.

Attempt to prevent torsional contortion of the hose pipe;.

Maintain the hose as much away as feasible from the warm radiating parts, and also it is needed to set up a thermal barrier;.

Avoid outside damages to the hose pipe, such as long-lasting friction externally of the very same element during use;.

If the tube's own weight causes extreme contortion, there ought to be support components.

Pipe installment.

Prior to setup, all steel pipelines can be marinaded initially, specifically the steel pipes connected to the ferrule type pipeline joints must be marinaded initially, and after that the ferrule is secured to the pipeline end in advancement;.

All pipeline joints must be cleansed with kerosene before installation, the O-rings inside should be temporarily removed for storage space, and also after that place on after the official installment;.

During building and construction, keep the oil ports, pipeline joints, pipe ends and also various other openings of pumps, suppliers and various other tools tidy, and do not permit foreign objects such as water and also dust to go into;.

The pipe shall be stocked a totally free state, as well as the welded pipeline shall not be forcibly taken care of and also linked by applying too much radial force;.

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

Pipe cleansing.

In order to guarantee the cleanliness of the lubrication system and provide the bearings of mechanical tools with clean oil, the pre-installed pipes need to be eliminated and cleansed. There are 2 kinds of cleaning: kerosene cleansing as well as pickling.

( 1) Things and also approaches of kerosene cleansing.

Things. Copper pipelines, stainless-steel pipes;.

The steel pipes that have been pickled before pre-installation, as well as the internal wall surface is cost-free of corrosion and also iron range; 2. The pipeline joints that were dirtied during the pre-installation; 3. Remove the pipelines as well as joints that require to be cleaned up, and utilize fabric (( It is necessary not to lose woollen).

( 2) Marinading techniques and also things.

Things. Steel pipes that have not been pickled prior to pre-installation; steel pipelines that have been pickled yet are now badly rusted.

Use tidy water to eliminate the dirt on the pipeline; 3. Rinse with tidy water For the add-ons produced in the above operations, the within of the pipeline ought to be cleaned with high-pressure water; 5. In order to effectively dry out the pipeline, the pipe should be submersed in warm water or vapor dried out.



The steel pipes that have actually been pickled before pre-installation, and the inner wall is free of rust and also iron scale; 2. Remove the pipes as well as joints that require to be cleaned up, and also use towel (( It is needed not to lose wool). Usage tidy water to remove the dust on the pipeline; 3. Rinse with tidy water For the accessories created in the above procedures, the within of the pipeline ought to be washed with high-pressure water; 5. In order to effectively dry the pipe, the pipe needs to be submersed in warm water or heavy steam dried out.

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