Notes

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

1. Seamless steel pipe for fluid: GB8163-99

2. Seamless steel pipe for boiler: GB3087-1999

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

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

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

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

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

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

9. Smooth steel pipeline for car half shaft: GB3088-1999.

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

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

Numerous alloy pipelines 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo steel pipes are separated into seamless steel pipes as well as welded steel pipelines according to various production processes. Seamless steel pipelines are smooth steel pipelines made from steel ingots, pipeline billets or steel poles perforated.

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

Benefits of hydraulic.

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

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

2. Lightweight, small size, tiny activity inertia as well as quick response rate.

3. Practical operation as well as control, which can realize stepless rate regulation in a vast range (speed law range approximately 2000:1).

4. The overload defense can be understood immediately.

5. Typically, mineral oil is utilized as the working medium, the loved one moving surface can be oiled by itself, and the solution life is long;.

6. It is simple to understand linear movement/.

7. It is very easy to recognize the automation of the device. When the electro-hydraulic mixed control is embraced, not only a greater degree of automatic control process can be understood, but likewise remote control can be understood.

Negative aspects of hydraulics.


1. As a result of the huge fluid flow resistance and leakage, the effectiveness is reduced. Otherwise managed appropriately, brake hose fittings will certainly not only pollute the website, but may likewise trigger fire as well as explosion accidents.

2. As the working efficiency is quickly impacted by temperature adjustments, it is not suitable to function under extremely high or extremely low temperature problems.

3. The manufacturing accuracy of hydraulic elements is high, so the cost is extra costly.

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

5. It is not very easy to figure out the reason when the hydraulic transmission fails; the use as well as maintenance need a greater technical degree.

Port installation.

The tube ought to not be exceedingly curved when it is moving or at remainder, nor can it be bent at the origin, yet should start to flex at least 1.5 times its size;.

When the pipe is relocated to an extreme position, it ought to not be pulled too snugly, it should be loosened;.

Attempt to avoid torsional deformation of the pipe;.

Maintain the tube as away as feasible from the warmth radiating components, and it is necessary to set up a warm shield;.

Avoid exterior damage to the pipe, such as long-term rubbing externally of the very same component during use;.

If the hose pipe's very own weight triggers excessive contortion, there ought to be support parts.

Pipe installation.

Prior to setup, all steel pipelines can be marinaded initially, especially the steel pipelines attached to the ferrule type pipe joints need to be pickled first, and afterwards the ferrule is secured to the pipeline end ahead of time;.

All pipe joints must be cleaned with kerosene prior to setup, the O-rings inside must be momentarily eliminated for storage space, and after that place on after the formal setup;.

During construction, maintain the oil ports, pipe joints, pipe ends and other openings of pumps, representatives and also various other devices clean, as well as do not enable international items such as water and also dust to get in;.

The pipe shall be laid in a totally free state, as well as the bonded pipe shall not be forcibly repaired and also connected by applying excessive radial force;.

The oil hole of the bearing seat should be inspected in advancement to see if the inner oil circuit is unblocked as well as if the oil port thread matches the joint.

Pipeline cleaning.

In order to make sure the sanitation of the lubrication system and provide the bearings of mechanical devices with tidy grease, the pre-installed pipelines have to be removed and cleaned up. There are two types of cleaning: kerosene cleansing as well as pickling.

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

Things. Copper pipelines, stainless-steel pipelines;.

method. 1. The steel pipelines that have actually been marinaded before pre-installation, and the inner wall is devoid of rust as well as iron range; 2. The pipeline joints that were soiled throughout the pre-installation; 3. Eliminate the pipelines and also joints that require to be cleaned, and make use of towel (( It is essential not to drop wool). Clean the within the tube with kerosene, soak both ends and joints in kerosene to clean, after that coat the within television with engine oil or fill with grease, and seal both ends for installment; 4. After cleansing, there ought to be no noticeable contaminants. ( hose fitting as iron filings, coarse impurities, welding slag, and so on), pay special interest to the welding slag on the internal wall of the weld have to be thoroughly cleaned.

( 2) Pickling objects and also methods.

Item. Steel pipelines that have not been marinaded before pre-installation; steel pipes that have been pickled but are now seriously worn away.

Usage clean water to get rid of the dirt on the pipeline; 3. Wash with clean water For the attachments created in the above operations, the within of the pipeline should be cleaned with high-pressure water; 5. In order to effectively dry out the pipe, the pipe needs to be submersed in hot water or vapor dried.



The steel pipelines that have actually been pickled prior to pre-installation, and the internal wall is totally free of corrosion and also iron scale; 2. Eliminate the pipelines and joints that require to be cleansed, and make use of fabric (( It is necessary not to shed wool). Use clean water to eliminate the dust on the pipe; 3. Rinse with clean water For the add-ons created in the above operations, the inside of the pipeline ought to be cleaned with high-pressure water; 5. In order to properly dry the pipe, the pipeline should be immersed in hot water or vapor dried out.

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