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您現在的位置:黃銅管 >新聞動態

黃銅管斷裂原因

作者:匿名    訪問量:4170    發布時間:2013-09-16

我公司是以生產、銷售、維護黃銅管為一體的公司,近年來公司不斷發展技術力量,創新生產技術手段,生產的產品銷往全國各地,受到客戶的一致好評,今天讓大家了解一下黃銅管斷裂原因:
隨著相關行業的發展,尤其是電力、船舶和海洋工業的快速發展,高精度黃銅管的市場需求量迅速上升。黃銅管本身對應力腐蝕破裂敏感,當同時存在足夠大的拉應力和含氨的腐蝕介質時,會導致應力腐蝕破裂。

    曾出現過凝汽器空抽區黃銅管斷裂,部分銅管中存在較大的拉應力,加之空抽區氨含量較高,經過一段時間運行,應力腐蝕不斷加劇,最終導致銅管斷裂。近年對在役凝汽器銅管渦流探傷中也發現部分銅管汽側有裂紋,其中大多是位于空抽區的黃銅管,裂紋以橫向為主,也有少量縱向裂紋,有的裂紋相當微小,在查漏中很難被發現,造成汽水品質長時間超標,有很大危害。

    凝汽器設備在停備用期間,由于設備中有水,而且銅管直接與空氣接觸,使設備停備用腐蝕速率遠大于運行中腐蝕。采用停用超過3天,將水側放空,打開人孔門通風干燥;短時間停用,維持循泵運行,防止循環水中的懸浮物沉積等措施,減緩凝汽器的停用腐蝕。

    鋁板利用檢修機會對凝汽器設備的腐蝕、結垢、黃銅管清潔等情況進行檢查,及時掌握凝汽器運行的第一手資料,并根據檢查要求建立檢查臺帳,規范檢查情況的記錄,規范凝汽器銅管管樣的制作、保管方法。由于渦流探傷檢測出要漏而未漏的銅管,查出銅管中存在的隱患。更多黃銅管知識請登錄:www.startamils.com。

中譯英:

Our company is the production, sales, maintenance of brass for the whole company, the development of the company technical force is constantly in recent years, technology innovation and production, products are sold throughout the country, by the customer the consistent high praise, today let everyone know about the cause of brass tube rupture:
With the development of related industries, especially the rapid development of power, marine and offshore industry, high precision brass pipe market demand is rising rapidly. Brass itself on stress corrosion cracking sensitivity, when there are large enough tensile stress and corrosion medium containing ammonia, can lead to stress corrosion cracking.
There had been condenser air pumping area brass tube rupture, larger tensile stress is part of the copper tube, and the air pumping region ammonia content is high, running after a period of time, stress corrosion intensified, eventually lead to copper pipe rupture. In recent years, part of the copper tube steam side cracks are found in service condenser copper pipe eddy current detection, mostly brass in empty pumping zone, crack in crosswise, also have a small amount of longitudinal crack, crack in some relatively small, leak can be difficult to find, the steam water quality caused by long time exceed the standard, there are great harm.
The condenser equipment in shut-down period, due to water equipment, and brass direct contact with air, the equipment corrosion rate is far greater than the shutdown operation of corrosion. The withdrawal of more than 3 days, the water side vent, open the manhole door ventilation drying; short time stopped, maintain the circulation pump operation, prevent circulating water suspended sediment and other measures, corrosion mitigation of condenser.
Aluminum by maintenance opportunity, corrosion of condenser equipment scaling, brass pipe cleaning to inspect, to master the operation of condenser first hand information timely, and the establishment of check accounts according to the inspection requirements, specification inspection record, specification, production of condenser copper tube like storage method. Due to the eddy current flaw detection to drain without leakage of brass, brass found hidden danger. More knowledge please login: www.startamils.com brass.