Logistics 8:00 last night before work, and why, is because of Qingdao Liu promised to be no matter how late the five anti-drag soft rubber joints to give him the goods. It is because of this commitment, workshop 10 employees, two employees of logistics department has to work overtime to 8:00. This is what we should do. The next day at noon, we received a thank you letter from Qingdao which customers wrote many words, to this thank you letter for us is very important, and we thank you letter which praised Kim Bellows Ltd. Hebei billion technical standards, good appearance, easy to use, in the letter mentioned above, our customer service staff is also very good, the very place he had bought such products in many places, not to buy back the use of the very satisfactory, the customer also said that we have chosen for his anti-drag soft rubber joints, whether it is in compliance in all aspects of their very needs, like a tailor-made for them, like! So some of the words. First we Hebei billion Golden Pipeline Co. very grateful to you, thank you for your Hebei billion pipeline has long been the gold support, I hope we will go on a long-term cooperation! We will have the lowest price back to old and new customers! I hope after you have done more satisfactory products and services. Bellows Bellows plane stability comprehensive stress its compressive strength given by the standard and weeks can be seen calculation methods and evaluation criteria to the stability of two reflects both the strength of those problems. When the bellows design allowable lower life, not only to its integrated meridional stress is high, hoop stress is relatively high, so quickly into the bellows local plastic deformation, resulting bellows instability. For the internal pressure of the bellows, the formation of plastic hinges in the displacement and stress peaks and troughs of the bellows, plus the pressure of stress, bellows quickly produce plane instability. This is the fundamental reason for the low fatigue life of the bellows under conditions of plane buckling displacement high pressure far below the fatigue life of the bellows. For example in the pre-displacement state, namely the bellows when the allowable displacement is 1/2 value of an allowable fatigue life of the bellows 200, which allows the design pressure not reached, the instability of the plane has been generated; XU with the fatigue life of the bellows 1000, the design pressure is reached, the corrugated tube is in a stable state plane, reaching 1.5 times the design pressure of the bellows is critical failure state; allowable fatigue life of 2000 cycles to meet the design pressure of bellows 1.5 times the bellows is still in the plane steady state. External pressure bellows from a longitudinal section view, by the equivalent of a pressure arch beam, while working the bellows in tension, the equivalent of a high arch arch beam reduces the price of non-metallic bellows, the ability to reduce its natural resistance to buckling . When the bellows single wave of displacement is too large bellows, corrugated inclined straight portion of large diameter bellows suppliers, making bellows crest diameter narrowing trend, but the peak ring diameter is determined, in order to coordinate the deformation, it will produce peak collapse manufacturers of stainless steel bellows, bellows circumferential instability. In the corresponding standards at home and abroad, about the displacement of the bellows to the external pressure affect the stability of the week were not involved, need to be further explored. [] _ Non-metallic bellows bellows billion in gold prices _ to Hebei Hebei billion pipeline is provided by gold piping. Welcome to consult Hebei billion Gold Pipe Manufacturing Co. (www.yijinguanjian.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Alan Li Tong