Requirements for Pipes Used for Hydraulic System
Design, placement, welding and cleaning
2．1Desgin
2．11 Radius of blend pipe, assembly and spanner space must be considered for pipes arrangement
2．12 The pipe should be solid and anti-shaking. Supporting frame or pipe clip should be set according to related standard.
2．13 Dia. and thickness of pipe must meet the flowing speed and pressure of the system.
2．14 Material of pipe should be chose according to the drawing. There must be no oxidation and other defects on the surface of the pipe. Straightness of the pipe should be less than 2‰.
2.15 15# cool pulling seamless steel pipe is recommended. Dia. 50/dia.40, thickness 4~5mm. Dia.34/dia.28, thickness 4~5mm. Dia.22/dia.18, thickness 2.5~3mm. Dia.14/dia.10,thickness 2~2.5mm.
2．2 Blend pipe and pipe arrangement
2．21 Cold-formed method is adopted: ≤φ48, machine blend is adopted, ＞φ50, forgings blend will be adopted.
2．21 Blend pipe radius: R≥3d.
2．23 One complete pipeline comprises of several pipes. These pipes should be arranged one by one, one after another.
2．24 Sizes should be taken when the blend pipe is formed. Length, chamfering and groove should be fixed according to different pipes.
2．25 Moulds should be used when blending is on process. Ovality of the pipe a:b＜10%, wave steepness 5%
2．3 Pipe installment, cleaning and handling
2．31 After the first pipe installment, marks should be made in case there will be 2nd assembly in the future.
2．32 Thickness of the welding pipe≤3.5mm, gas shielded welding.
2．33 Thickness of the welding pipe≥5mm, gas shieded welding first and then electrical welding on the surface.
2．34 Butwelding should be adopted to weld pipe with flange, conjunction, groove, chamfer welding according to TB/ZQ-4000.4-86. Sleeve joint welding should be avoided.
2．35 Pipe cutting should be done by machineries. Fire cutting is not allowed in case there will be oxidation on the surface.
2．36 Residual, burr and casting fin should be removed after pipe welding.
2．37 Pipe pre-assembly: no forced conjunction. All the pipes should be connected naturally and in fine condition. If not, please make the conjunction part well.
2．38 Acid pickling and Ni-P plating of pipes should be processed.
2．39 Clean the processed pipes with compressed air and then assembly them according to the marks.
Medium Used in Hydraulic System
Working Medium:YB-46# antiwear hydraulic oil(generally local brand Long Wall).
System cleanlinessL NAS1638 standard, grade 9.
Acid-washing and circulating washing must be adopted for hydraulic pipes.
Hydraulic oil must be pumped to oil container (80% of the oil container should be filled) by oil filter cart.
3 months after machine operation, user should clean the oil filter and oil container thoroughly or change the filter element.
Shanghai Huang Fa Ji Spring Games Report
In order to enrich the staff's spare time, show the company's good spirit and corporate image, the head of the office actively and conscientiously planned and organized, on April 12th, the Shanghai Huangfaji Machinery Mould Co., Ltd. spring sports meeting was held. The sports meeting was adapted to local conditions and held more than ten competitions such as tug-of-war, three-person football, table tennis and badminton. The enthusiasm for employees to participate in the competition was high, the number of participants reached 112, and the participation rate was almost 100%. After the Games, the award ceremony was held and 57 people received honorary certificates and prizes.
Looking back at the Games, there are many places worthy of recollection: First, conscientiously implement and implement the "National Fitness Program", creating an environment of "happy work, healthy living"; second, successfully held the spring sports meeting, enriching the amateur of the staff and workers Life; Third, due to the active participation of employees, while showing a good spirit, it also brings good mood to employees to work hard.
To build an excellent enterprise, it must not only have high economic benefits, but also a prosperous corporate culture; not only must there be rich material civilization, but also a high degree of spiritual civilization. Active staff spiritual and cultural life, safeguarding the physical and mental health of employees, and improving the overall quality of employees are not only an inevitable trend to improve corporate vitality and promote corporate culture, but also an important work measure for employees to improve their mental state and mobilize their enthusiasm.
Welcome to join us on 22th International Glass Exhibition
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The crystal glassware, also known as the lead crystal glassware, is divided into high lead (36%PBO and 24% PBO), medium lead (18% PBO) and low lead (12-16% PBO) according to the PBO (lead oxide) content.
Three Major Differences:
1. Sound: gently knock or finger a vessel, the crystal glassware will make a clear sound and transmit a graceful aftersound in air, but the common glassware will only make a boring “kaka” sound.
2. Handfeel: when gently grasping a crystal high-heel bar cup, you will have a kind of heavy handfeel, but for the common glass, you will only have a kind of light handfeel.
3. Glossiness: when raising a crystal cup up to the light, you will find it’s just like a delicate handicraft which is pure white, glittering and translucent, and can refract charming colorful lights, but the common glassware is low in glossiness and doesn’t refract lights.
