【正文】
e that the parts are: (a) Produced by the Manufacturer。 C) shall meet the requirements of UCS66, unless exempted by the following. (a) The coincident ratio de?ned in Fig. is or less. (b) The material(s) is exempted from impact testing per Fig. UCS66. UG136(b) (4) Materials used in nozzles, disks, and other parts contained within the external structure of the pressure relief valves shall be one of the following categories: (a) Listed in Section II。 C), or steam service shall have a substantial lifting device, which when activated will release the seating force on the disk when the pressure Relief valve is subjected to a pressure of at least 75% of the set pressure of the valve. Pilot operated pressure relief valves used on these services shall be provided with either a lifting device as described above or means for connecting and applying pressure to the pilot adequate to verify that the moving parts critical to proper operation are free to move. UG136(a) (4) the seat of a pressure relief valve shall be fastened to the body of the pressure relief valve in such a way that there is no possibility of the seat lifting. UG136(a) (5) in the design of the body of the pressure relief valve, consideration shall be given to minimizing the effects of deposits. UG136(a) (6) Pressure relief valves having screwed inlet or outlet connections shall be provided with wrenching surfaces to allow for normal installation without damaging operating parts. UG136(a) (7) Means shall be provided in the design of all pressure relief valves for use under this Division for sealing all initial adjustments which can be made without disassembly of the valve. Seals shall be installed by the Manufacturer or Assembler at the time of initial adjustment. Seals shall be installed in a manner to prevent changing the adjustment without breaking the seal. For pressure relief valves larger 2 Than NPS 1|2 (DN 15), the seal shall serve as a means of identifying the Manufacturer Or Assembler making the initial adjustment. UG136(a) (8) If the design of a pressure relief valve is such that liquid can collect on the discharge side of the disk, except as permitted in (a)(9) below, the valve shall be equipped with a drain at the lowest point where liquid can collect (for installation, see UG135). UG136(a) (9) Pressure relief valves that cannot be equipped with a drain as required in (a) (8) above because of design or application may be used provided: (a) The pressure relief valves are used only on gas service where there is neither liquid discharged from the valve nor liquid formed by condensation on the discharge side of the valve。 F (60176。 F(?30176。 (2) The Quality Control System of the Assembler receiving the pressure relief valve parts shall de?ne the controls for the procurement and acceptance of those parts。當(dāng) 安全閥 將 受 到 至 少 75%的 閥的設(shè)定壓力 時,提升機(jī)構(gòu)動作,釋放閥座上的密封力。 UG 136( a)( 6) 泄壓閥 有 螺紋連接的入口或出口, 應(yīng)該具有扳手?jǐn)Q轉(zhuǎn)面 ,以便正 常安裝 而 不損壞工作部件。 為 了 泄 壓閥更 實(shí)用該密封應(yīng) 作為 一種方式來 識別 制造商 或匯編程序作出 的 初步調(diào)整。 UG 136( b)材 料 的選擇 2 UG 136( b)( 1)鑄鐵 支 座和 閥瓣 是 不允許的 UG 的 136( b)( 2)相鄰滑動面,如 導(dǎo)向套,閥瓣 或 閥瓣夾持器 ,都 應(yīng)使用 腐蝕耐磨材料。操作溫度低于 20F(29C)的碳鋼和低合金鋼。 ( 3) 由泄壓閥出版商控制的材料, 其化學(xué),物理和質(zhì)量規(guī)范的控制等效于 ASTM標(biāo)準(zhǔn)。該授權(quán)在初始批準(zhǔn) 5 周年后的那一天失效,如果在失效前 6 個月內(nèi)下列試驗(yàn)重復(fù)合格的可延長 5 年有效期。 ( c)如果任何 泄 壓閥 在 等于或高于其認(rèn)證的能力 范圍內(nèi) 不 能 緩解 或者不能滿足其性能要求 , 則應(yīng)該取不合格泄壓閥的兩倍數(shù)量進(jìn)行復(fù)試 按上面的 ( c)( 3) 3 ( a) 取樣。 ( 3) 泄 壓閥零件妥善包裝,標(biāo)識,或由制造商蓋章,以確保零件 是: ( a)生產(chǎn)制造商 生產(chǎn) ( b) 零件是最初的未經(jīng)改變的 然而 , 裝配廠 可將原有的加工成品 轉(zhuǎn) 到另一部分 ,為完成特定的應(yīng)用 . 在下列情況下的具體應(yīng)用: ( 1) 轉(zhuǎn)換應(yīng)當(dāng)由生產(chǎn)廠家指定 , 圖紙和零件轉(zhuǎn)換使用的書面說明 部分 應(yīng)該被制造商接受或者應(yīng)該 有前 后加工轉(zhuǎn)化部分 的圖紙和說明 ( 2)組裝的質(zhì)量控制體系, 由一個來自指定 ASME 組織 的 代表接受,必須詳細(xì)說明原裝零件的改變程序,包括 檢查和驗(yàn)收規(guī)定, 人員培訓(xùn), 以及現(xiàn)行版本制造廠 圖 紙或書面說明 的控制 。制造商須記錄這些審查的結(jié)果 這方面的一個文件的副本應(yīng)由 裝配廠 妥善保存,審查結(jié)果應(yīng)提供給一名 ASME 指定機(jī)構(gòu) 代表 查閱 UG 136( c)( 5) 除了 UG 129 的 要求 之外 銘牌 標(biāo)記 還 應(yīng)包括 制造廠和最終裝配廠的 名稱。上述活動場所及使用的裝置都不是制造廠所使用的,裝配廠在組織上可與制造廠無關(guān)或整個或部分屬于制造廠。 這些試驗(yàn)應(yīng)在部件 所有機(jī)械 加工操作完成 后進(jìn)行 。 用于蒸汽或具有用于蒸汽的特殊內(nèi)件的 泄壓閥應(yīng)用蒸汽做實(shí)驗(yàn)由于規(guī)格或調(diào)定壓力超過發(fā)生蒸汽實(shí)驗(yàn)裝置的能力時可用空氣進(jìn)行試驗(yàn)。實(shí)際的試驗(yàn)壓力(冷差壓試驗(yàn)壓力) 應(yīng)該按 UG 129 的要求標(biāo)志在閥門上。 UG 136( e)設(shè)計要