In the early morning of December 18, Beijing time, the price of New York crude oil closed higher on Monday. The driving factor was the continued tension in the Middle East, and some investors were optimistic about the US parties’ agreement on the fiscal cliff. On the New York Mercantile Exchange, the price of light crude oil for delivery in January increased by 47 cents to settle at 87.20 US dollars a barrel, or 0.5%. Crude oil prices rose 1% last Friday. U.S. policy makers must resolve the fiscal cliff by the end of the year to avoid a recession.
It has been reported that Speaker Boehner of the House of Representatives may accept tax increases for millionaires in return for spending on medical care, welfare and other welfare projects. However, the White House hopes to raise taxes on individuals earning more than 200,000 U.S. dollars and families with more than 250,000 U.S. dollars.
Andrey Kryuchenkov, Commodity Analyst at VTB Capital, said: “Washington’s policies (if any) will continue to cast a dark shadow on the macro outlook for 2013, and investors will prefer to stay on top of the big bets before the problem is resolved. ."
The development of the situation in the Middle East also provided a favorable backdrop for the price of crude oil to rise. The Iranian Foreign Minister stated on Monday that it is necessary to break the stalemate on the nuclear issue with other major powers. Syria’s vice president called for a peaceful solution to the violent conflict, suggesting that President Bashar Assad may not play a role in Syria’s future.
1. Correct selection of teeth
1) Before use, confirm whether the mechanical properties of the product meet the customer's requirements (such as the tensile strength of the Bolt and the safe load of the nut).
2) The length of the bolt should be selected properly, with 1-2 pitch exposed after tightening.
3) Before use, the thread should be kept clean.
2. How to use dental strips correctly
1) When tightening the teeth, pay attention to that the direction of force applied by the wrench should coincide with the axis of the screw, and do not tilt.
2) In the process of tightening, the force should not exceed the safety torque, and should be uniform. Try to use the torque wrench or socket.
3) Locking too fast will lead to locking, it is recommended not to use electric or pneumatic wrench.
4) Keep the thread clean. In order to ensure the smooth fit of screw and nut, it is recommended to put the product in a clean container and do not place it at will.
3. Standard of tooth bar maintenance
1) If there is slight damage to the removed tooth, screw and nut, the die and tap shall be used for repair.
2) The removed and repaired teeth, Screws and Nuts shall be maintained by means of oil bubble or lubricating oil, and shall be placed in order according to specifications, models and purposes.
4. Scrap standard
The bolts with obvious crack, broken thread, sliding, disorderly thread, screw tensile deformation, shear trace, etc. which can not be repaired by the on-site leader can be scrapped.
5. Specification parameters of tooth strips
Texture of material:
304/316
Product standard:
DIN975
Surface treatment:
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