Manual arc welding is adopted for welding, and the welding rod model is E4303, and the brand is J422. The basic shape and size of weld groove shall comply with GB985-88. 5. When flexible waterproof casing is rolled, the allowable deviation of perimeter is D2 ≤ 600, D2>600 ± 0.0035D2. 6. The thickness of the concrete wall where the wall passes through shall not be less than 300, otherwise the wall shall be thickened on one side or both sides, and the diameter of the thickened part shall be at least D5+200. 7. The weight of flexible waterproof casing shall be calculated with L=300. If the wall thickness is greater than 300, it shall be calculated separately. 8. If a non concrete wall is encountered at the place where the flexible waterproof casing passes through the wall, the concrete wall shall be used locally, and the pouring range shall be 200 larger than the wing ring diameter (D5). Moreover, the casing must be poured at one time in the fire pool of the inner wall to prevent the use of flexible waterproof casing in the middle. Because the equipment has a certain function of preventing water from seeping, flowing and flowing to the lower layer, the "prevention" here has two aspects: on the one hand, it refers to that after the completion of the project, the user, during the decoration stage, causes the running water to flow through the casing pipe to the lower layer due to improper reasons; On the other hand, after the user enters the station, the accident causes the running water to flow through the casing to the lower layer, and the former is often more than the latter.
When the rigid waterproof sleeve passes through the pipeline or other cables, it needs to be plugged into the gap with jute and other sealants. The sealing performance is poor, and it cannot be used in the flexible waterproof sleeve with high sealing requirements. Because it has a closed wing ring and a protective resistance plate, it should be treated carefully when the pipeline passes through the closed partition wall. Reserved holes are not allowed, Electric ball valve can also be called flexible electric ball valve, electric ball valve, electric ball valve, flexible electric ball valve, valve expansion joint, electric ball valve, shock absorber, etc. It is a pipe connector with high elasticity, high air tightness, medium resistance and weather resistance. The electric ball valve is generally composed of an inner rubber layer, a fabric reinforcement layer (the reinforcement layer has multiple layers of rubber scraped nylon cord fabric), a middle rubber layer, an outer rubber layer, an end reinforced metal ring or a steel ring, which is formed by vulcanization at high temperature and pressure, and loosely combined with a metal flange or a parallel joint. This product makes use of the advantages of the valve, such as high elasticity, high air permeability, medium resistance, weather resistance and radiation resistance, which can reduce the vibration and noise of the pipeline and compensate for the expansion and contraction caused by temperature changes.
The valve materials used vary according to the media, including natural rubber, styrene butadiene rubber, butyl rubber, butyl rubber, EPDM, neoprene rubber, silicon valve, fluorine valve, etc. It has the functions of heat resistance, acid resistance, alkali resistance, corrosion resistance, abrasion resistance, oil resistance, etc. If it is right, don't care what others say, it can only affect your judgment; If you need hard work, don't be stingy with your efforts. There has never been a real success and you can grow effortlessly in the weeds; If the pay is not equal to the gain, there is no need to complain too much, which will make your heart more tired; If we face a complete failure, we don't have to be true to our destiny. We will have many difficulties in the afterlife. Requirements for metal flange and flat union: metal flange shall meet the requirements of GB/T9119, and flat union shall meet the requirements of GB/T3289.37. Requirements when the end face of the electric ball valve is reinforced with steel wire rings: when the end face of the electric ball valve is reinforced with steel wire rings, the steel wire rings shall be round and located in the same plane in the same year. The difference between electric ball valve and electric ball valve: what is the difference between electric ball valve and electric ball valve? The two seem very similar, but their functions are different. Stainless steel metal hose, also known as metal hose, electric ball valve and stainless steel hose, has good flexibility, temperature resistance, pressure resistance and corrosion resistance, and is suitable for transmission of steam, water, oil and various industrial gases and other media. The electric ball valve ball is composed of a valve pipe with multiple layers of rubber scraped nylon cord fabric and outer rubber layer in the inner rubber layer and reinforcement layer.
The valve materials used vary according to the media, including natural rubber, styrene butadiene rubber, butyl rubber, butyl rubber, EPDM, neoprene rubber, silicon valve, fluorine valve, etc. It has the functions of heat resistance, acid resistance, alkali resistance, corrosion resistance, wear resistance, oil resistance, etc. The electric ball valve plays an important role in the movement, thermal expansion absorption, vibration absorption of the pipeline system. The model length and connection mode of the electric ball valve are based on the user's requirements. Qinhuangdao high temperature resistant electric ball valve first line brand guarantee fast step is not to leap, but to continue; Slow pace is not slow, but wandering; A good road is not a road, but a broad one; The dangerous road is not a steep slope, but a trap; Great happiness is not to get, but to have; Good wealth is not money, but health; Great blessings are not for the future, but for the present.