城市燃?xì)獾募夹g(shù)標(biāo)準(zhǔn)(德國(guó))(參考版)
2025-01-10 09:53本頁面
【正文】 THT, TBM 10mg THT/TBM approx. Leakage inspection of installation stations (suitability for use) flowmeasuring device pressure sensor 010l/h 0150mbar annually DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Steel gas pipelines for operating pressures over 5 bar Maintenance G 4661 April 2023 運(yùn)行壓力 5Bar以上燃?xì)怃摴? —維護(hù)管理 DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Scope ? Maintenance (inspection, servicing and repair) of gas pipelines for public and mercial gas distribution with an operating pressure over 5 bar designed to transmit gases in accordance with G 260 (1st and 2nd family of gases). G 4661 適用范圍 ? 含 5公斤以上維護(hù)（檢測(cè)，服務(wù)和維修）， gas pipelines for public and mercial gas distribution with an operating pressure over 5 bar designed to transmit gases in accordance with G 260 (1st and 2nd family of gases). DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Contents ? General (staff requirements) ? Definitions and terms ? Inspection and maintenance ? Repair (execution of works) ? Commissioning of new pipelines ? Gas pipeline demissioning and abandonment G 4661 DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Inspection and maintenance 檢測(cè)和維護(hù) Section surveys in undeveloped areas by surveillance on foot, mobile survey or surveillance by air 野外區(qū)域分段監(jiān)測(cè)和監(jiān)管，步行，車巡 ? Surveillance on foot or by mobile survey: every 4 months minimum每 4個(gè)月 ? Surveillance by air: monthly。 after interruption of work, if necessary (cf. also G 4651, ) Surface inspection of buried LPG pipelines , nonoperative pipelines gassensitive semiconductor 1 – 20,000ppm H2/C3H8 1ppm H2/C3H8 10ppm H2 Distinction marsh gas/natural gas gas chromatograph with suitable measuring cell 10ppm C2H6 50ppm C2H6 Weekly to 6monthly indication sensitivity tests, depending on service availability Determination of odorant content in bustible gas electrochemical measuring cell gas chromatograph with suitable measuring cell 1100mg/m179。 concentrationdependent acoustic signal % CH4 heat of reaction 1 – 100% LEL 1% LEL DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Special instrumentation Service case Principle of action Measuring range Minimum instrumental sensitivity Signal Calibration gas Frequency Inspection of odorisers for external leaks gassensitive semiconductor 1 – 20,000mg ethanol, THT, TBM 1 mg ethanol, THT, TBM in air concentrationdependent acoustic signal。 fixed signal at end of measuring range 1 % CH4 ultrasound qualitative 30l/h bustible gas/inert gas (distance between gas pipeline and device ≤ 10m) Inspection of ground air, air in sewers, pits, change of gas type (missioning and demissioning of gas pipelines) thermal conductivity sonic speed – 100 % CH4/C3H8/CO2 % bustible gas 100 % CH4 Weekly to 6monthly indication sensitivity tests, depending on service availability Inspection of indoor air, air in pits and sewers for reaching the LEL threshold gassensitive semiconductor 1 – 50% LEL 1% LEL freely adjustable, . 10% LEL。 . 10ppm 10ppm CH4 1) Sensitivity tests before start of work。 2) After the leak has been removed, inspection in conformance with G 4651 is mandatory. 當(dāng)漏點(diǎn)消除后，按照 G 4651 要求，需要強(qiáng)制性型檢驗(yàn) 3) Daily to fortnightly unscheduled inspection in winter, depending on risk potential 冬季里的每天直到 2周一次的突發(fā)事件的檢驗(yàn)，要根據(jù)潛在的風(fēng)險(xiǎn)來制定。 2) After the leak has been removed, inspection in conformance with G 4651 is mandatory. 當(dāng)漏點(diǎn)消除后，按照 G 4651 要求，需要強(qiáng)制性型檢驗(yàn) 3) Daily to fortnightly unscheduled inspection in winter, depending on risk potential 冬季里的每天直到 2周一次的突發(fā)事件的檢驗(yàn)，要根據(jù)潛在的風(fēng)險(xiǎn)來制定。 2023年頒布實(shí)施 DVGW Technical Rules on Gas Pipeline Inspection DVGW關(guān)于燃?xì)夤芫€檢測(cè)的技術(shù)標(biāo)準(zhǔn) Scope—適用 的范圍
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