【 Weak current College 】 fire ball valve performance requirements and test methods---Power By 【 China power house network 】

1. subject matter and scope of application of this standard stipulates a fire ball valve product classification, technical requirements, test procedure, inspection rules and marks, package, transportation and storage. This standard is applicable for transporting water, foam mixture and other liquid medium, medium temperature:-40 ~ + 70 ° c fire ball valve. This standard does not apply to transport gas extinguishing fire ball valve. 2. reference standard GB3181 film color standard sample GB3452.1 hydraulic pneumatic with rubber sealing o-ring dimension series and tolerance GB12220 General valve flag GB12223 part of rotary valves driven devices connected GB12225 General valve specifications for copper alloy castings GB12226 General valve castings technology conditions GB12227 General valve ductile iron specifications GB/T12252 General valve supplier requirements JB/Z246 ball valve hydrostatic life test procedures 3 product classification 3.1 structure 3.1.1 fire ball valve in its sphere of seal forms are divided into: a. one-way seals; b. two-way sealed. 3.1.2 fire ball valve according to their connection with the pipeline into the form: a. 2 flange; b. 2-thread; c. end flanges, end of the thread. 3.2 specifications specifications of fire ball valve should be consistent with the requirements of the table 1, the special specifications can be produced according to the contract. Table 1 nominal diameter mm nominal pressure, MPa 1.0 1.6 2.5 4.0 Δ Δ Δ Δ 25 32 Δ Δ Δ Δ Δ Δ Δ Δ 40 50 Δ Δ Δ Δ Δ Δ Δ-65 80 100 Δ Δ Δ-Δ Δ Δ--125-150 Δ-Δ-Note: that this data. -Indicates that the absence of such specifications. 3.3 model of fire ball valve of the model 3.3.1 by class, group ID, ball seal forms code, the nominal passes the diameter and the nominal pressure, and pipe connection form code, form: including: classes, group code with FQ said that means fire ball valve; ball valve seal form code selection according to table 2; the nominal passes the diameter and the nominal pressure and unit selection according to table 1; and pipeline connection form code selection according to table 3. Table 2 seal sphere code one-way -seal S two-way sealed tables 3 and pipelines connect the form code II F flange two-thread L end flanges, -end and thread 3.3.2 model example end flanges, end of the thread, nominal diameter 65mm, nominal pressure 1.6MPa two-way sealed fire ball valve of the model: FQS65/1.6 2 flange, nominal diameter 50mm, nominal pressure 4.0MPa one-way sealed ball valve of the model: FQ50/4.0F 4 technical requirements 4.1 surface quality fire ball surface should have anticorrosion coating or anticorrosive treatment. Coating color should be bright and clean, even, without Peel, scratches, and other defects. 4.2 operation performance 4.2.1 fire ball valve should generally be fitted with hand wheel or handles. 4.2.2 fire ball valve gate should be light and flexible, and export the pressure difference is nominal pressure value, the opening and closing fire ball valve of force not greater than 350N. 4.2.3 when fire ball valve is closed, the hand wheel or handle should generally be clockwise. Hand wheel on that switch in the direction of the marker. One-way seals should fire ball represents the media flow. 4.2.4 bring handle fire ball valve in the open position, the handle should be parallel to the channel with the ball. 4.2.5 handwheel or handle should be installed securely and, if required, can be easily removed or replaced. 4.2.6 fire ball valve shall have full open and full off-limit structure. 4.2.7 when using pneumatic, electric or hydraulic driven fire ball valve, the drive unit and the valve and connects size should be consistent with the provisions of the GB12223. 4.3 material 4.3.1 valve body, valve covering use of cast iron, or other materials. Cast iron should be consistent with the provisions of the GB12226, GB12227. Other materials should comply with the provisions of the corresponding technical standards. 4.3.2 sphere is copper alloy castings or other material. Copper alloy castings shall conform to the requirements of GB12225. Other materials-machinery and corrosion resistance should not be lower than the provision of copper alloy castings. 4.3.3 stem material corrosion resistance should not be lower than the valve body material. 4.3.4 seat, PTFE seals available or nylon and other material, of the seat material corrosion resistance should not be lower than the valve body material. 4.3.5O-shaped rubber seals should be consistent with the provisions of the GB3452.1. 4.3.6 packing, spacer should be able to fire the ball valve of the temperature range. Any metal gasket and the valve should be at least equivalent corrosion resistance. 4.3.7 handwheel, handle, the handle seating steel, malleable cast iron or ductile cast iron. 4.3.8 body drain plug material corrosion resistance should not be less than the bodyMaterial. 4.4 pressure resistance 4.4.1 shell fire ball valve pressure resistance should follow the provisions of section 5.2.2 shells withstand voltage test, test duration, bearing wall and the valve body and valve are covered and joined Department may not be visible to the hull leakage, (including the stuffing and the valve body and valve are covered and joined) there should be no structural damage. Shell test pressure allows packing Department leaks, but when the test pressure drops to sealed test pressure should be no visible leaks. 4.4.2 sealing performance fire ball valve should follow the requirements of 5.2.3 for sealing test, in test duration should be no evidence of leakage. 4.4.3 test pressure and test duration fire ball valve casing pressure test, the test pressure sealing test and test duration should be consistent with the requirements of the table 4. Table 4 test pilot projects pressure test duration , min shell withstand voltage test of nominal pressure value 1.5 times 2 sealing test nominal pressure value 1.1 times 1 4.5 static life fire ball valve shall be adjusted according to the provisions of article 5.3 static life test, test result shall conform to the provisions of table 5. Table 5 public nominal diameter times 100 mm ≤ ≥ ≥ 10 000 mm 125 ≥ 6 4.6 000 coating color fire ball valve on the external surface of the coating color use GB3181 provisions RO3 big red. 5 test method 5.1 hoist force test fire ball valve hoist 5.1.1 force should use three standard Ergometer or precision grade same other measuring device testing. 5.1.2 hoist force tests should be along the handwheel or handle tangent direction of rotation. 5.1.3 hand wheel and handle the focal point of measurement shall be according to figure 1, Figure 2 shows location. With ball head handle, measuring force allows the ball head Center. 5.1.4 testing allowed before a fire ball 10 full open full-closed pre-treatment operations. 5.1.5 test should ensure fire ball valve in the open or close the pressure after the fire ball valve of nominal pressure value. 5.2 withstand test 5.2.1 test requirements test medium is water 5.2.1.1, temperature should be between 5 ~ 40 ℃. 5.2.1.2 testing process and should not give rise to fire the ball valve is likely to affect the test results of external forces. 5.2.1.3 test pressure should gradually increase the minimum test pressure values in the test duration to maintain pressure unchanged. 5.2.1.4 test should be fire-ball valve to exclude the air inside the body cavity. 5.2.1.5 detection using pressure gauges or pressure indicator accuracy of not less than 1 level, quantum is a test pressure of 1.6 times. 5.2.1.6 shells withstand voltage test, fire ball valve on the external surface shall be painted or use other may conceal the coating surface defects. To have painted inventory of fire ball, shell test allows reservations coating. 5.2.1.7 seal test should withstand voltage test in the shell. 5.2.1.8 seal test, seal the surface should be clean, grease-free, in order to prevent the seal surface abrasion, can not thick a layer of film on kerosene. 5.2.2 shells withstand test will be part of the opening of the sphere, closed end fire ball at the other end to a body cavity filled with water, pressurized to test pressure, then to the shell (including the stuffing and the valve body and valve are covered and joined Department). The test duration and its result shall conform to the provisions of section 4.4.1. 5.2.3 seal test on the provisions of the media flow to fire the ball valve, Globe section opened, closed fire ball valve outlet port, from the entrance to the cavity filled with water, pressurized to test pressure, closed sphere, release the pressure outlet port, open outlet port, check the seal performance. Does not require media flows to fire the ball at the other end, it should also be in the same method of compression, check. The test duration and its result shall conform to the provisions of section 4.4.2. 5.3 static life test fire ball valve hydrostatic life test Z246 according to JB/. 5 test method 5.1 hoist force test fire ball valve hoist 5.1.1 force should use three standard Ergometer or precision grade same other measuring device testing. 5.1.2 hoist force tests should be along the handwheel or handle tangent direction of rotation. 5.1.3 hand wheel and handle the focal point of measurement shall be according to figure 1, Figure 2 shows location. With ball head handle, measuring force allows the ball head Center. 5.1.4 testing allowed before a fire ball 10 full open full-closed pre-treatment operations. 5.1.5 test should ensure fire ball valve in the open or close the pressure after the fire ball valve of nominal pressure value. 5.2 withstand test 5.2.1 test requirements test medium is water 5.2.1.1, temperature should be between 5 ~ 40 ℃. 5.2.1.2 testing process and should not give rise to fire the ball valve is likely to affect the test results of external forces. 5.2.1.3 test pressure should gradually increase the minimum test pressure values in the test duration to maintain pressure unchanged. 5.2.1.4 test should be fire-ball valve to exclude the air inside the body cavity. 5.2.1.5 detection using pressure gauges or pressure indicator accuracy of not less than 1 level, quantum is a test pressure of 1.6 times. 5.2.1.6 shells withstand voltage test, fire ball valve on the external surface shall be painted or use other potentially cover a surface defectCoating. To have painted inventory of fire ball, shell test allows reservations coating. 5.2.1.7 seal test should withstand voltage test in the shell. 5.2.1.8 seal test, seal the surface should be clean, grease-free, in order to prevent the seal surface abrasion, can not thick a layer of film on kerosene. 5.2.2 shells withstand test will be part of the opening of the sphere, closed end fire ball at the other end to a body cavity filled with water, pressurized to test pressure, then to the shell (including the stuffing and the valve body and valve are covered and joined Department). The test duration and its result shall conform to the provisions of section 4.4.1. 5.2.3 seal test on the provisions of the media flow to fire the ball valve, Globe section opened, closed fire ball valve outlet port, from the entrance to the cavity filled with water, pressurized to test pressure, closed sphere, release the pressure outlet port, open outlet port, check the seal performance. Does not require media flows to fire the ball at the other end, it should also be in the same method of compression, check. The test duration and its result shall conform to the provisions of section 4.4.2. 5.3 static life test fire ball valve hydrostatic life test Z246 according to JB/.