The design neglects the addition of the insulating filler to the insulating layer which hinders the free thermal expansion of the small tube. The device does not have to be used for a long time to generate cracks and penetrate the wall thickness. The design of the insulation layer is not under pressure, so the rupture disc is placed at the top of the insulation layer. The gas pressure leaking into the heat insulating layer causes the rupture disc to blast, but the rupture disc has a small diameter, which is insufficient to quickly release the pressure, so that the pressure of the heat insulating layer is further increased, thereby causing the carbon steel insulating layer shell to blast. The mode of blasting is also very characteristic. The top is a brittle fracture and gradually transforms into a ductile tear because the tip temperature is lower than the carbon steel plastic transition temperature and the lower shell temperature is the ambient temperature.
Another material problem with pressurized equipment is the quality assurance of the bolt material. At present, most bolts are produced in specialized chemical plants, but different enterprises have uneven quality control, and poor quality control is likely to cause safety hazards. At the 2009 British Pressure Vessel Symposium, the quality of the Chinese bolt manufacturer registered as SUN was introduced. The bolt material certificate stated that the strength meets the requirements of BS4882B7, but the installer will tighten the bolts when assembling the flange. At first, I thought it was too much force, but I found that the bolts had serious defects, and the defects were almost through the entire section, but the outer surface inspection looked intact. Later, the investigation found that this was caused by the pulling of the bar when it was pulled too fast. According to the requirements of British Standard BS4882B7, such bolts should be subjected to tensile and impact tests every 680kg. It can be seen that the bolt manufacturer may not have a tensile test, so there will be problems when pulling. Fortunately, this problem was discovered earlier, otherwise it is very likely that a big accident will occur. Therefore, the fasteners for pressure vessels must have a mechanical strength performance warranty written in batches and meet the requirements of bolt-specific standards.
Product categorie of Lamp Part Series, we are specialized manufacturer in producing Aluminum Die Casting,Die Casting Lamp Mould, offer Lamp Part Series R & D and manufacturing, we have the perfect after-sales service and technical support. Look forward to your cooperation!
Lamp part series
1. Aluminum Lamp part series.
2. With high performance.
3. Different surface treatment. 4. ISO9001:2008 certification.
5. Improve the life of Lamp and Protect the light source.
6. Aluminum Die Casting suitable for communications, auto parts, lamp
part series, Water Pump Part Series, power tool series, radiator part
series, anti-static flooring products and Other Series Products.
Lamp part series inspection:
Inspection: in-house and third party
All the lamp part series are strictly inspected by operator and skilled QC with record put down.
Universal inspection tools: hardness tester, Height ruler, Depth ruler, Outside ruler, Venire Caliper, etc.
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Spectrum analyzer |
CMM |
Best service:
1, Good communication with every of our customer, especially willing to discuss the details of your drawings.
2, On time delivery to guarantee.
3, High quality lamp part series with a reasonable price.
Our Advantage
(1)Ten years of experience in manufacturing and exporting lamp part series.
(2) OEM and custom-made service for lamp part series.
(3) All kinds of castings can be manufactured according to drawing, sample or specific industry standard.
(4)Strong engineering team makes high quality
(5) The coordinated service (casting, machining and surface treatment) make lower price possible.
(6) Advanced-level equipments.
(7) Full material testing process and quality control system.
(8) Lamp part series quality warranty and on time delivery.
If you are interested, please contact us to talk about the details for lamp part series. You need to send us your drawing or sample to make mold first. Then we quote you price, if price accepted, we will open mold for you and send you sample before mass production.
LED Housing,Aluminum Lamp Housing,Aluminum Lamp Parts
Ningbo Bowang Machinery Co.,Ltd , http://en.zjbwjx.com