Notes

standard intro<br>
Hydraulic pipelines, simn are noted individually due to the five significant elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipe for liquid: GB8163-99

2. Seamless steel pipe for boiler: GB3087-1999

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

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

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

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

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

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

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

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

11. Cold-drawn cold-rolled accuracy smooth steel pipeline: GB3639-1999.

Different alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are split into smooth steel pipelines and also welded steel pipelines according to various production processes. Smooth steel pipes are smooth steel pipes made from steel ingots, pipeline billets or steel rods perforated.

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

Benefits of hydraulic.

Compared to mechanical transmission as well as electric transmission, hydraulic transmission has the following benefits:.

1. Various parts of hydraulic transmission can be easily as well as flexibly set up according to needs.

2. Lightweight, tiny dimension, little movement inertia and also quick reaction rate.

3. Hassle-free procedure and also control, which can recognize stepless rate policy in a variety (speed guideline range approximately 2000:1).

4. The overload protection can be recognized instantly.

5. Normally, mineral oil is used as the functioning medium, the family member moving surface area can be oiled on its own, as well as the life span is long;.

6. It is very easy to recognize straight motion/.

7. It is very easy to realize the automation of the machine. When the electro-hydraulic mixed control is adopted, not just a higher level of automated control process can be realized, but likewise push-button control can be realized.

Disadvantages of hydraulics.

1. As a result of the huge liquid circulation resistance and also leakage, the effectiveness is reduced. Otherwise taken care of properly, the leakage will not only pollute the site, yet might likewise trigger fire as well as surge crashes.

2. As the working efficiency is easily impacted by temperature level modifications, it is not ideal to function under very high or very low temperature conditions.

3. The production precision of hydraulic elements is high, so the price is a lot more pricey.

4. As a result of the leak as well as compressibility of the fluid tool, a rigorous transmission proportion can not be gotten.

5. When the hydraulic transmission stops working; the use and also maintenance require a greater technological level, it is not easy to discover out the reason.

Connector installation.

The hose pipe should not be excessively curved when it is relocating or at remainder, neither can it be curved at the origin, but ought to begin to flex at the very least 1.5 times its size;.

When the tube is moved to a severe setting, it needs to not be drawn as well securely, it needs to hang;.

Try to avoid torsional deformation of the tube;.

Keep the pipe as far away as feasible from the warm radiating components, and it is essential to install a thermal barrier;.

Avoid exterior damage to the tube, such as lasting friction externally of the very same part during usage;.

There ought to be assistance parts if the hose's own weight creates excessive contortion.

Pipeline setup.

Prior to installment, all steel pipelines can be pickled initially, specifically the steel pipes linked to the ferrule type pipeline joints must be pickled initially, and after that the ferrule is secured to the pipeline end ahead of time;.


All pipeline joints ought to be cleaned with kerosene prior to installation, the O-rings inside need to be briefly gotten rid of for storage space, and then place on after the formal setup;.

During building, maintain the oil ports, pipeline joints, pipe ends as well as various other openings of pumps, representatives and also other equipment tidy, as well as do not allow foreign objects such as water and dust to enter;.

The pipeline will be stocked a cost-free state, as well as the welded pipe shall not be by force repaired and also linked by using too much radial force;.

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

Pipeline cleansing.

In order to guarantee the cleanliness of the lubrication system as well as provide the bearings of mechanical equipment with tidy grease, the pre-installed pipelines should be gotten rid of as well as cleaned. There are two sorts of cleansing: kerosene cleansing as well as pickling.

( 1) Things as well as methods of kerosene cleansing.

Object. Copper pipelines, stainless-steel pipelines;.

approach. 1. The steel pipes that have been pickled before pre-installation, as well as the inner wall surface is without rust and also iron scale; 2. The pipeline joints that were dirtied throughout the pre-installation; 3. Eliminate the pipes and joints that need to be cleansed, and also make use of cloth (( It is needed not to lose wool). Wipe the inside of television with kerosene, soak both ends and also joints in kerosene to clean, then coat the within television with engine oil or loaded with oil, and also seal both finishes for installation; 4. After cleansing, there need to be no noticeable pollutants. (Such as iron filings, fibrous contaminations, welding slag, etc), pay unique focus to the welding slag on the inner wall surface of the weld need to be completely cleaned.

( 2) Marinading items and also approaches.

Item. ac hose fittings that have not been pickled prior to pre-installation; steel pipelines that have been marinaded however are now significantly rusted.

method. 1. Utilize a degreasing representative to eliminate the oil sticking to the pipe; 2. Use clean water to eliminate the dust on the pipe; 3. Remove the rust spots on the pipeline wall, rolled iron filings, etc in the pickling remedy; 4. Rinse with tidy water For the attachments created in the above procedures, the within the pipe need to be washed with high-pressure water; 5. Counteract the acid remedy staying on the pipe with lye; 6. In order to efficiently dry the pipeline, the pipe ought to be immersed in hot water or heavy steam dried out. Make the pipes completely dry; 7. Inspect the pickled pipes to see if they are clean; 8. Seal the opening of the pipe with plastic or plastic tape instantly after marinading to avoid contaminant and moisture from intruding [1]



The steel pipelines that have been marinaded before pre-installation, and also the internal wall surface is complimentary of rust as well as iron range; 2. Remove the pipelines and also joints that require to be cleaned, and use fabric (( It is necessary not to drop woollen). Use clean water to remove the dirt on the pipe; 3. Wash with clean water For the attachments generated in the above operations, the within of the pipeline should be washed with high-pressure water; 5. In order to effectively dry out the pipe, the pipeline must be submersed in hot water or heavy steam dried out.

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