MVME177-015工控自動(dòng)化卡件
2015年11月第14頁(yè)，共35頁(yè)598.6（c）（c）地下和地面管道泄漏檢測。（1） 從1995年8月11日開(kāi)始，業(yè)主和運營(yíng)商必須檢查地下和地面管道是否泄漏。所使用的方法必須設計用于檢測常規含有危險物質(zhì)的管道的任何部分的泄漏，并且可以包括本節第（b）小節規定的適用于儲罐的任何方法，但本節（b）（5）段除外。注意本小節第（3）段中吸入管道的例外情況。（2） 如果地下管道被加壓，則還必須安裝一個(gè)自動(dòng)管線(xiàn)泄漏檢測器，該檢測器可提醒業(yè)主或操作員存在泄漏。探測器必須能夠限制或關(guān)閉流量或觸發(fā)警報。管道泄漏檢測器還必須能夠在1小時(shí)內以每平方英寸10磅的管道壓力檢測每小時(shí)3加侖的泄漏，檢測概率為95%，誤報概率為5%或更低。必須使用制造商制定的程序對檢漏儀的操作進(jìn)行年度測試。（3） 對于滿(mǎn)足以下所有條件的吸入管道，無(wú)需進(jìn)行泄漏檢測：（i）在低于大氣壓力的條件下運行；（ii）是傾斜的，以便當抽吸被釋放時(shí)，管道的內容物會(huì )排回水箱
每條管線(xiàn)中只有一個(gè)止回閥；以及（iv）止回閥直接位于抽吸泵的下方并且盡可能靠近抽吸泵。（d） 檢查內襯罐。在內襯固定到地下儲罐后的10年內，必須對儲罐進(jìn)行內部檢查，發(fā)現其結構完好，內襯仍按照原始設計規范運行。此后每五年必須進(jìn)行一次復檢。（e） 氣密性試驗標準。（1） 密封性測試是部門(mén)可接受的測試，用于確定儲罐和管道系統是否密封。這應包括：（i）能夠檢測每小時(shí)十分之一加侖（gph）的儲罐或管道泄漏的試驗，檢測概率為95%，誤報概率為5%或更低，最大閾值為一小時(shí)內泄漏百分之五加侖，考慮到蒸汽袋、產(chǎn)品熱膨脹和收縮等變量，溫度分層、地下水位、蒸發(fā)、壓力和儲罐變形；或6 NYCRR第598部分–2015年10月11日第15頁(yè)，共35頁(yè)598.6（e）（ii）根據本部分第598.7（d）節的要求進(jìn)行的結構檢查。（2） 如果在技術(shù)上不可能進(jìn)行有意義的氣密性試驗，則必須進(jìn)行部門(mén)可接受的替代試驗或檢查。
November 2015 Page 14 of 35 598.6 (c) (c) Underground and surface pipeline leak detection. (1) From August 11, 1995, owners and operators must check whether underground and surface pipelines are leaking. The method used must be designed to detect leaks in any part of a pipeline that routinely contains hazardous substances, and may include any method applicable to tanks as specified in subsection (b) of this section, except paragraph (b) (5) of this section. Note the exception to suction piping in paragraph (3) of this subsection. (2) If the underground pipeline is pressurized, an automatic pipeline leakage detector must also be installed, which can alert the owner or operator of the leakage. The detector must be able to limit or turn off the flow or trigger an alarm. The pipe leak detector must also be capable of detecting a leak of 3 gallons per hour at 10 pounds per square inch of pipe pressure in 1 hour with a 95% probability of detection and a 5% probability of false positives or less. The operation of the leak detector must be tested annually using the procedures established by the manufacturer. (3) No leak detection is required for suction piping that meets all of the following conditions: (i) operates below atmospheric pressure; (ii) be sloped so that when suction is released, the contents of the pipe will drain back to the tank
There is only one check valve in each pipeline; And (iv) a check valve directly below and as close to the suction pump as possible. (d) Check the liner tank. Within 10 years after the liner is fixed to the underground tank, the tank must be inspected internally, and found to be in good condition, and the liner still operates according to the original design specifications. Thereafter, re inspection must be carried out every five years. (e) Air tightness test standard. (1) Sealing test is a test acceptable to the department to determine whether the tank and piping system are sealed. This shall include:; Or 6 NYCRR Part 598 – October 11, 2015 Page 15 of 35 598.6 (e) (ii) Structural inspection in accordance with section 598.7 (d) of this part. (2) If it is technically impossible to carry out meaningful air tightness tests, alternative tests or inspections acceptable to the department must be carried out.
