Type <br> <br> China's production of explosion-proof tools 1 tools from the early 1980s to the development of two varieties of hand tools, explosives tools, lifting fixtures, pallets and transmission components, nearly 40 varieties of 300 Multiple specifications.
2 Management of explosion-proof tools 2.1 Quality management (1) According to the "Explosion-proof tools" national standard GBl0686-10693-89 Explosion-proof performance test method for copper alloy tools, the manufacturer shall make products every 2 to 3 years during normal production. Samples made of materials are sent to the nationally designated testing unit for periodic explosion-proof performance tests. After passing the test, it is clearly stated in the test report and the product instruction manual which type of gas is being tested and should be understood by the user.
(2) Materials used in explosion-proof tools: When casting materials, when each elemental material (such as electrolytic copper plate) enters the factory, the supply department holds the material list of the manufacturer, and the factory must have a test form before entering the warehouse. The material is sent to the casting plant for use. If there is no qualified material, the workshop reserves the right to reject the material.
(3) The measurement of ingredients, first set up measurement points in the raw material warehouse to ensure the accuracy of the storage. Before the workshop (casting) furnace measuring point, the complex (school) weighing personnel must be set up, and after signing the approval, it can be smelted into the furnace.
(4) Explosion-proof tool materials The smelting of harmful elements is strictly controlled. Each batch or furnace (regardless of weight or volume) must be tested. However, at present, it cannot be tested before the furnace can be treated. Only when casting can be tested, so in the smelting, when the charge temperature rises to the process, the charge temperature, the furnace workers rely on visual inspection (experience) notice to check the technologist with a thermometer re-test approval, with a small spoon to stir the metal on the next 1 scoop (3 scoops in total) of pre-fired samples. The furnace length immediately struck the sample with a hammer and bent it to a specified angle. The inspector broke the specimen and broke the visual inspection section metal. The metallurgy can be cast with experience, and the sample can be submitted to the laboratory for testing. After passing the test results, the qualified castings can be processed in the next step.
(5) Specimens of explosion-proof material physical properties. Each month, six standard as-cast test blocks shall be taken. Each furnace shall not exceed one block per day. After passing the test, it will be marked permanently and submitted to the physical property test room.
The above chemical physical properties of the test strips, test blocks should be kept by the physical and chemical department.
(6) Inspection of other processes, such as forging heat treatment, gold cutting and other processes, should also be clearly defined. Such as forging shop processing, the need to heat the workpiece to isothermal combustion, fuel heating conditions, etc. have changes and impact on the metallographic organization, should be sampled, repeated physical and chemical tests.
The same applies to the heat treatment process, but the heat treatment methods are various; mainly due to heating and cooling. The workpiece made of explosion-proof material is a very difficult condition for infiltrating different elements. The specimen that must be made must not be repeatedly specified in (4) and (5), but it must be qualified according to the explosion-proof performance test specified in GBl0686. The surface treatment shall not be coated with any other coating other than a rustproof sleeve.
The focus of cold processing is to ensure the geometric shape, ensure the use of the user, according to the design and manufacturing.
2.2 Use Management The explosion-proof tool is a special kind of special tool for safety. It has the property of not generating sparks when the tool collides with a workpiece and rubs. Most of the specifications are based on steel tools. They are made of multi-element non-ferrous metals with copper as the base material, and some products are specially designed. Therefore, there are certain requirements for the use of methods, maintenance, storage and transportation. Only by fully understanding and rationally selecting, properly using and keeping it can we give full play to its advantages in various performances. Therefore, users should strictly observe the following precautions.
(1) The explosion-proof tool is a kind of safety protection product, so the user must purchase the product that has passed the test and qualification appraisal by the nationally recognized explosion-proof performance test unit. When purchasing, please carefully understand the scope of application, performance, features, methods of use, and precautions specified in its instructions. In addition, the "Ex" mark is usually marked on its tool body and it has a certificate of conformity. Unmarked tools should not be purchased for use.
(2) Before using explosion-proof tools, combustible gas in the workplace should be compared with explosion-proof test gas; qualified products with higher-grade media can be used in media sites with lower levels of danger. Conversely, products that pass the lower-grade media test cannot be used in locations with higher levels of risk. If special needs are required, the manufacturer is required to use the test unit after passing the test.
Obviously, it should not be arbitrarily used as a common tool in non-hazardous locations to avoid losing its proper performance. What should be pointed out is that it should not be used as an alternative. For example, if the specifications of current production varieties do not meet the requirements of users, they must apply for special designs and manufacturing.
(3) Explosion-proof medium is high-strength and corrosion-resistant in most medium gases. However, it is not corrosion resistant under all circumstances, such as corrosion in wet ammonia, certain ammonium salts, acetylene, moist fluorine, chlorine, ammonium chloride, certain dichromates, potassium hydrides, etc. The degree is quite large. In addition, some media may react chemically with copper alloys, resulting in dangerously explosive substances, such as acetylene steel produced by acetylene and steel. When using explosion-proof tools for this purpose, as far as possible in a dry environment, if it is impossible to avoid using in a humid environment, try to speed up the operation speed and reduce the working time, so as to avoid causing greater corrosion and dangerous. After use, wipe clean at any time, and is strictly prohibited and belong to: eroding medium with the same total storage.
(4) Explosion-proof manual tools of various types of wrenches, have different rated strength, is strictly prohibited over-loading the use of casing, in addition to tapping spanners shall not tap, so as to avoid overload due to fracture and deformation, affecting the normal use. In the process of using the tool, a variety of specifications should be reasonably selected according to their needs. They should not be treated as small generations, nor should they be treated as if they were made of steel tools. It should also be pointed out that when using adjustable wrenches, pipe wrenches, and wrenches, Pay attention to the direction of the force, and do not arbitrarily reverse the force. When using the tool with the blade, the hardness of the workpiece itself should be determined first. If the hardness is close to the hardness of the tool, careful operation must be performed. If the hardness of the tool is higher than the hardness of the tool, it is prohibited. . When the workpiece is tightened, semi-permanently fixed or rusted for a long time, and no other measures are taken before using the hand tools, the use shall be prohibited, so as not to damage the tools.
(5) After the explosion-proof tool is deactivated, it should be wiped clean at any time. Those who do not use them for six months should be oiled or preserved by antiseptic methods. Discarded for more than one year should be oiled into bags or stored in boxes. Worn or damaged parts of the used tools, especially those with blades. Can be trimmed in non-hazardous locations. If the damage is serious and should not be repaired, it should be scrapped and not sickened.
2 Management of explosion-proof tools 2.1 Quality management (1) According to the "Explosion-proof tools" national standard GBl0686-10693-89 Explosion-proof performance test method for copper alloy tools, the manufacturer shall make products every 2 to 3 years during normal production. Samples made of materials are sent to the nationally designated testing unit for periodic explosion-proof performance tests. After passing the test, it is clearly stated in the test report and the product instruction manual which type of gas is being tested and should be understood by the user.
(2) Materials used in explosion-proof tools: When casting materials, when each elemental material (such as electrolytic copper plate) enters the factory, the supply department holds the material list of the manufacturer, and the factory must have a test form before entering the warehouse. The material is sent to the casting plant for use. If there is no qualified material, the workshop reserves the right to reject the material.
(3) The measurement of ingredients, first set up measurement points in the raw material warehouse to ensure the accuracy of the storage. Before the workshop (casting) furnace measuring point, the complex (school) weighing personnel must be set up, and after signing the approval, it can be smelted into the furnace.
(4) Explosion-proof tool materials The smelting of harmful elements is strictly controlled. Each batch or furnace (regardless of weight or volume) must be tested. However, at present, it cannot be tested before the furnace can be treated. Only when casting can be tested, so in the smelting, when the charge temperature rises to the process, the charge temperature, the furnace workers rely on visual inspection (experience) notice to check the technologist with a thermometer re-test approval, with a small spoon to stir the metal on the next 1 scoop (3 scoops in total) of pre-fired samples. The furnace length immediately struck the sample with a hammer and bent it to a specified angle. The inspector broke the specimen and broke the visual inspection section metal. The metallurgy can be cast with experience, and the sample can be submitted to the laboratory for testing. After passing the test results, the qualified castings can be processed in the next step.
(5) Specimens of explosion-proof material physical properties. Each month, six standard as-cast test blocks shall be taken. Each furnace shall not exceed one block per day. After passing the test, it will be marked permanently and submitted to the physical property test room.
The above chemical physical properties of the test strips, test blocks should be kept by the physical and chemical department.
(6) Inspection of other processes, such as forging heat treatment, gold cutting and other processes, should also be clearly defined. Such as forging shop processing, the need to heat the workpiece to isothermal combustion, fuel heating conditions, etc. have changes and impact on the metallographic organization, should be sampled, repeated physical and chemical tests.
The same applies to the heat treatment process, but the heat treatment methods are various; mainly due to heating and cooling. The workpiece made of explosion-proof material is a very difficult condition for infiltrating different elements. The specimen that must be made must not be repeatedly specified in (4) and (5), but it must be qualified according to the explosion-proof performance test specified in GBl0686. The surface treatment shall not be coated with any other coating other than a rustproof sleeve.
The focus of cold processing is to ensure the geometric shape, ensure the use of the user, according to the design and manufacturing.
2.2 Use Management The explosion-proof tool is a special kind of special tool for safety. It has the property of not generating sparks when the tool collides with a workpiece and rubs. Most of the specifications are based on steel tools. They are made of multi-element non-ferrous metals with copper as the base material, and some products are specially designed. Therefore, there are certain requirements for the use of methods, maintenance, storage and transportation. Only by fully understanding and rationally selecting, properly using and keeping it can we give full play to its advantages in various performances. Therefore, users should strictly observe the following precautions.
(1) The explosion-proof tool is a kind of safety protection product, so the user must purchase the product that has passed the test and qualification appraisal by the nationally recognized explosion-proof performance test unit. When purchasing, please carefully understand the scope of application, performance, features, methods of use, and precautions specified in its instructions. In addition, the "Ex" mark is usually marked on its tool body and it has a certificate of conformity. Unmarked tools should not be purchased for use.
(2) Before using explosion-proof tools, combustible gas in the workplace should be compared with explosion-proof test gas; qualified products with higher-grade media can be used in media sites with lower levels of danger. Conversely, products that pass the lower-grade media test cannot be used in locations with higher levels of risk. If special needs are required, the manufacturer is required to use the test unit after passing the test.
Obviously, it should not be arbitrarily used as a common tool in non-hazardous locations to avoid losing its proper performance. What should be pointed out is that it should not be used as an alternative. For example, if the specifications of current production varieties do not meet the requirements of users, they must apply for special designs and manufacturing.
(3) Explosion-proof medium is high-strength and corrosion-resistant in most medium gases. However, it is not corrosion resistant under all circumstances, such as corrosion in wet ammonia, certain ammonium salts, acetylene, moist fluorine, chlorine, ammonium chloride, certain dichromates, potassium hydrides, etc. The degree is quite large. In addition, some media may react chemically with copper alloys, resulting in dangerously explosive substances, such as acetylene steel produced by acetylene and steel. When using explosion-proof tools for this purpose, as far as possible in a dry environment, if it is impossible to avoid using in a humid environment, try to speed up the operation speed and reduce the working time, so as to avoid causing greater corrosion and dangerous. After use, wipe clean at any time, and is strictly prohibited and belong to: eroding medium with the same total storage.
(4) Explosion-proof manual tools of various types of wrenches, have different rated strength, is strictly prohibited over-loading the use of casing, in addition to tapping spanners shall not tap, so as to avoid overload due to fracture and deformation, affecting the normal use. In the process of using the tool, a variety of specifications should be reasonably selected according to their needs. They should not be treated as small generations, nor should they be treated as if they were made of steel tools. It should also be pointed out that when using adjustable wrenches, pipe wrenches, and wrenches, Pay attention to the direction of the force, and do not arbitrarily reverse the force. When using the tool with the blade, the hardness of the workpiece itself should be determined first. If the hardness is close to the hardness of the tool, careful operation must be performed. If the hardness of the tool is higher than the hardness of the tool, it is prohibited. . When the workpiece is tightened, semi-permanently fixed or rusted for a long time, and no other measures are taken before using the hand tools, the use shall be prohibited, so as not to damage the tools.
(5) After the explosion-proof tool is deactivated, it should be wiped clean at any time. Those who do not use them for six months should be oiled or preserved by antiseptic methods. Discarded for more than one year should be oiled into bags or stored in boxes. Worn or damaged parts of the used tools, especially those with blades. Can be trimmed in non-hazardous locations. If the damage is serious and should not be repaired, it should be scrapped and not sickened.
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