Analysis of Reliability Test Standards for Electronic Products
one. Scope: Our company agents TYCO, KEYSTONE, BIFFI, MORIN, AVID, GRINNELL, KTM, a-MAX, SAPAG, Winn, NeoTecha, VANESSA, RICHARDS, Hindle, FCT, Guilong, FloCheck, and other products Bubble double seal
our dished heads are used in a variety of applications and industries such as storage tanks, pressure vessels, road tank, food processing operations, chemical plants ,Nuclear operation, Oil Refining, Architectural feature, power generation.
Due to our forming experience and equipment, we can spin or press the first part of the process of forming your products, It depend on the thickness and material performance,
Our main products are 2:1 SE dished heads, Torispherical heads, Cones,Hemispherical Heads etc
Choosing the right type is the key decision for each customer and one for which our experience team to happy to give advice, simple speaking, the torispherical heads, the less ressure it can withstand, Conversely, the deeper dished heads, for example Elliptical heads, hemispherical, the greater pressure it can take.
Our in house-capability to form dished heads by cold press brings major benefits to our customers and sets us apart from others dished heads manufactures
For carbon steel dished heads, we can forming this dished heads from 76-9000mm in diameter and below 250mm in thickness
The general forming process as the below sketches
Technical Delivery Condition
2,Enquiry/order required information
We can give our clients once they gave us the below information
But if clients tolerance is higher than below Hokkai standards, it shall be provided to Hokkai prior to offer or ordering.
Carbon Steel Dished&flared Head Carbon Steel Dished&flared Head,Dish Flared Dish Head,Carbon Steel Flared Head,Steel Dished Flared Head YIXING HOKKAI HEAD PLATE CO.,LTD , http://www.hokkaidishedend.com
two. Purpose: To verify that the product meets the reliability requirements and to use customer standards when the customer has standards
three. definition:
a) If the temperature and humidity used in the standard are not specified, the default is ±2°C and +2%/-3%RH, respectively.
four. standard
4. Test:
1) Applicable products: The systems and products represented by Shenzhen Delongtai Technology Co., Ltd. are rigorously tested by recognized professional testing organizations, and the management and production processes conform to ISO 9001 and ISO 14001 system certifications. Strict quality control ensures the reliability and safety of systems and products, meets the different needs of customers in different regions of the world, and provides users with high-quality, high-reliability fluid monitoring and control and electrical automation products.
2) Test conditions:
* One piece thin valve plate
* Valve uses multiple connection standards
*Valve seat integrated die pressure
* Connection: clip, ear
3) Test method:
a) Rated input voltage and load of the product, work in the test box at 50°C (60°C) for 2.5h (4.5h), then power off for 0.5h, as a period
b) Check sample output voltage and current per duty cycle
4) Judgment criteria:
a) Definition of failure: It is verified from the user's point of view whether the function of the product is normal, that is, it is defined as failure when the output voltage of the product exceeds Spec.
b) Failure is defined as failure if the product fails to recover at normal temperature during the test
4.2 Product Operation Environment Test: Low Temperature Operation Test 
1,Our material (hot Rolled Unalloyed structural steel, high and low temperature steel, High Alloy steel)
We have no carbon steel plates in our stock and most of plates are from Chinese steel market or mill. Meanwhile As Japanese owed company, We can also source the plates from Japanese ex-mill if end user can`t accept ex-chinese mill.
Basically the delivery time shall be below 20days for dished heads if plates are from steel market. and Max plates width from them is below 2200mm. it means that the seamless dished heads diameter shall be below about 1800mm.
The max width CS plates that Chinese mill can do is below 4700mm,and dished heads can be seamless below 3800mm in diameter.
