1) In general, strength tests are not conducted on valves, but strength tests should be conducted on repaired or corroded valve bodies and covers. For safety valves, their constant pressure, reseating pressure, and other tests should comply with the instructions and relevant regulations.

(2)閥門安裝之彰應(yīng)作強(qiáng)度和密封性試驗(yàn)。低壓閥門抽查20%，如不合格應(yīng)100%的檢查;中、高壓閥門應(yīng)100%的檢查。

(2) The valve installation should undergo strength and sealing tests. 20% of low-pressure valves shall be randomly inspected, and if they are not qualified, 100% of them shall be inspected; Medium and high pressure valves should be 100% inspected.

(3)試驗(yàn)時(shí)，閥門安裝位置應(yīng)在容易進(jìn)行檢查的方向。

(3) During the test, the valve should be installed in a direction that is easy to inspect.

(4)焊接連接形式的閥門，用肓板試壓不行時(shí)可采用錐形密封或O型圈密封進(jìn)行試壓。

(4) When blind plate pressure testing is not feasible for valves connected by welding, conical seals or O-ring seals can be used for pressure testing.

(5)液壓試驗(yàn)時(shí)就將閥門空氣盡量排除。

(5) During the hydraulic test, try to exhaust the valve air as much as possible.

(6)試驗(yàn)時(shí)壓力要逐漸增高，不允許急劇、突然地增壓。

(6) During the test, the pressure should gradually increase and sudden pressure increase is not allowed.

(7)強(qiáng)度試驗(yàn)和密封性式驗(yàn)持續(xù)時(shí)間一般為2~3min，重要的和特殊的閥門應(yīng)持續(xù)5min。小口徑閥門試驗(yàn)時(shí)間可相應(yīng)短一些，大口徑閥門試驗(yàn)時(shí)間可相應(yīng)長一些。在試驗(yàn)過程中，如有疑問可延長試驗(yàn)時(shí)間。強(qiáng)度試驗(yàn)時(shí)，不允許閥體和閥蓋出現(xiàn)冒汗或滲漏現(xiàn)象。密封性試驗(yàn)，一般閥門只進(jìn)行一次，安全閥、高壓閥等生要閥門需進(jìn)行兩次。試驗(yàn)時(shí)，對低壓、大口徑的不重要閥門以及有規(guī)定允許滲漏的閥門，允許有微量的滲漏現(xiàn)象;由于通用閥門、電站用閥、船用閥門以及其他閥門要求各異，對滲漏要求應(yīng)按有關(guān)規(guī)定執(zhí)行。

(7) The duration of strength test and sealing test is generally 2-3 minutes, and important and special valves should last for 5 minutes. The testing time for small diameter valves can be correspondingly shorter, while the testing time for large diameter valves can be correspondingly longer. During the testing process, if there are any doubts, the testing time can be extended. During the strength test, sweating or leakage is not allowed on the valve body and valve cover. Sealing test is generally only conducted once for valves, and twice for safety valves, high-pressure valves, and other essential valves. During the test, minor leakage is allowed for valves with low pressure and large diameter, as well as valves with specified allowable leakage; Due to the different requirements for general valves, power station valves, marine valves, and other valves, leakage requirements should be implemented in accordance with relevant regulations.

(8)節(jié)流閥不作關(guān)閉件密封性試驗(yàn)，但應(yīng)作強(qiáng)度試驗(yàn)及填料和墊片處的密封性試驗(yàn)。

(8) The throttle valve does not undergo a sealing test for the closing part, but should undergo a strength test and a sealing test at the packing and gasket.

(9)試壓中，閥門關(guān)閉力只允許一個人的正常體力來關(guān)閉;不得借助杠桿之類工具加力(除扭矩扳手外)，當(dāng)手輪的直徑大于等到于320mm時(shí)，允許兩人共同關(guān)閉。

(9) During pressure testing, the valve closing force only allows one person's normal physical strength to close; Do not use tools such as levers to apply force (except for torque wrenches). When the diameter of the handwheel is greater than or equal to 320mm, two people are allowed to close it together.

(10)具有上密封的閥門應(yīng)取出填料作密封性試驗(yàn)，上密封官合后，檢查是否滲漏。用氣體作試驗(yàn)時(shí)，在填料函中盛水檢查。作填料密封性試驗(yàn)時(shí)，不允許上密封處于密位置。

(10) Valves with upper seals should have their packing removed for a sealing test. After the upper seal is closed, check for leakage. When using gas for testing, check with water in the stuffing box. When conducting sealing tests on fillers, it is not allowed to have the upper seal in a tight position.

(11)凡具有驅(qū)動裝置的閥門，試驗(yàn)其密封性時(shí)應(yīng)用驅(qū)動裝置關(guān)閉閥門拮進(jìn)行密封性試驗(yàn)。對手動驅(qū)動裝置，還應(yīng)進(jìn)行用動關(guān)閉閥門的密封試驗(yàn)。

(11) For valves with a driving device, the sealing test should be conducted by closing the valve with the driving device. For manual drive devices, a sealing test should also be conducted to manually close the valve.

(12)強(qiáng)度試驗(yàn)和密封性試驗(yàn)后裝在主閥上的旁通閥，在主閥進(jìn)行強(qiáng)度和密封性試驗(yàn);主閥關(guān)閉件打開時(shí)，也應(yīng)隨之開啟。

(12) The bypass valve installed on the main valve after strength and sealing tests shall undergo strength and sealing tests on the main valve; When the closing part of the main valve is opened, it should also be opened accordingly.

(13)鑄鐵閥門強(qiáng)度試驗(yàn)時(shí)，應(yīng)用銅錘輕敲閥體和閥蓋，檢查有否滲漏。

(13) When conducting strength tests on cast iron valves, a copper hammer should be used to lightly tap the valve body and cover to check for leaks.

(14)閥門進(jìn)行試驗(yàn)時(shí)，除旋塞閥有規(guī)定允許密封面涂油外，其他閥門不允許在密封面上涂油試驗(yàn)。

(14) When conducting tests on valves, except for plug valves where oil is allowed on the sealing surface, other valves are not allowed to apply oil on the sealing surface for testing.

(15)閥門試壓時(shí)，盲板對閥門的壓緊力不宜過大，以免閥門產(chǎn)生變形，影響試驗(yàn)效果(鑄鐵閥門如果壓得過緊，還會破損)。

(15) During valve pressure testing, the pressure of the blind plate on the valve should not be too large to avoid deformation and affect the test effect (if the cast iron valve is pressed too tightly, it may also be damaged).

(16)閥門試壓完畢后，應(yīng)及時(shí)排除閥內(nèi)積水并擦干凈，還應(yīng)作好試驗(yàn)記錄。

(16) After the pressure test of the valve is completed, the accumulated water inside the valve should be promptly drained and wiped clean, and test records should be kept.