Notes

basic introduction<br>
hydraulic fittings and hoses , simn are listed individually because of the five significant elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S).

1. Seamless steel pipeline for liquid: GB8163-99

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

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

4. High-pressure smooth steel pipes for plant food devices: GB6479-1999.

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

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

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

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

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

10. irrigation hose fitting 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 into smooth steel pipelines and welded steel pipelines according to various production processes. Seamless steel pipes are seamless steel pipelines made from steel ingots, pipeline billets or steel poles perforated.

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

Benefits of hydraulic.

Compared to mechanical transmission and electrical transmission, hydraulic transmission has the following advantages:.

1. Various components of hydraulic transmission can be comfortably and also flexibly prepared according to demands.

2. Light weight, tiny size, small motion inertia as well as rapid response speed.

3. Hassle-free operation and also control, which can recognize stepless rate law in a variety (speed regulation range up to 2000:1).


4. The overload security can be understood automatically.

5. Generally, mineral oil is utilized as the functioning medium, the loved one moving surface area can be lubed by itself, and the solution life is long;.

6. It is simple to understand linear activity/.

7. fitting brake hose is easy to understand the automation of the equipment. When the electro-hydraulic consolidated control is embraced, not only a higher degree of automatic control procedure can be recognized, but likewise remote control can be realized.

Disadvantages of hydraulics.

1. Due to the big fluid circulation resistance as well as leakage, the performance is low. If not dealt with correctly, the leak will not just pollute the site, however may also create fire as well as surge crashes.

2. As the working performance is conveniently impacted by temperature changes, it is not suitable to work under extremely high or very reduced temperature problems.

3. The manufacturing precision of hydraulic elements is high, so the rate is much more pricey.

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

5. It is not very easy to learn the cause when the hydraulic transmission falls short; the usage and maintenance require a higher technological degree.

Adapter installment.

The hose must not be excessively bent when it is relocating or at rest, nor can it be curved at the root, however should start to bend at the very least 1.5 times its size;.

When the hose pipe is relocated to a severe setting, it must not be drawn as well firmly, it should hang;.

Try to stay clear of torsional deformation of the hose pipe;.

Keep the pipe as far as feasible from the warmth emitting parts, and it is required to install a thermal barrier;.

Avoid outside damage to the pipe, such as long-lasting friction on the surface of the exact same component during usage;.

If the hose pipe's very own weight triggers extreme deformation, there need to be assistance parts.

Pipe installment.

Prior to installation, all steel pipes can be pickled initially, particularly the steel pipes linked to the ferrule type pipeline joints must be pickled first, and after that the ferrule is attached to the pipeline end in advancement;.

All pipe joints must be cleaned with kerosene before setup, the O-rings inside ought to be briefly removed for storage space, and after that place on after the formal installment;.

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

The pipeline will be laid in a free state, and the welded pipeline will not be by force repaired and connected by applying excessive radial force;.

The oil hole of the bearing seat need to be signed in advancement to see if the internal oil circuit is unblocked and if the oil port thread matches the joint.

Pipe cleaning.

In order to make certain the tidiness of the lubrication system and also supply the bearings of mechanical devices with clean grease, the pre-installed pipes should be eliminated and cleansed. There are 2 sorts of cleaning: kerosene cleaning and also pickling.

( 1) Objects and also techniques of kerosene cleansing.

Object. Copper pipelines, stainless-steel pipelines;.

The steel pipelines that have actually been marinaded prior to pre-installation, as well as the inner wall surface is totally free of corrosion as well as iron range; 2. The pipeline joints that were stained throughout the pre-installation; 3. Remove the pipes and also joints that require to be cleansed, as well as use fabric (( It is essential not to shed wool).

( 2) Marinading things as well as techniques.

Item. Steel pipes that have not been marinaded before pre-installation; steel pipelines that have been pickled however are now drastically corroded.

Usage clean water to remove the dirt on the pipeline; 3. Rinse with tidy water For the accessories generated in the above operations, the inside of the pipe must be cleaned with high-pressure water; 5. In order to efficiently dry the pipeline, the pipe ought to be immersed in hot water or steam dried.



The steel pipes that have actually been marinaded before pre-installation, and also the internal wall is totally free of rust and also iron range; 2. Remove the pipes as well as joints that need to be cleaned up, and also utilize cloth (( It is needed not to shed woollen). Usage clean water to get rid of the dirt on the pipe; 3. Wash with tidy water For the add-ons produced in the above operations, the inside of the pipe ought to be cleaned with high-pressure water; 5. In order to successfully dry the pipe, the pipe should be submersed in hot water or steam dried.

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