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1 导言和近二十年来的发展直到1973年,西德联邦材料研究试验局(BAM)在焊接、切割及类似方法用的乙炔和氧钢瓶减压器的型式试验范围内对位于减压器上的压力表按照DIN 8549进行试验。它随着1973年4月出版的DIN8549版本作了变更。在这标准中第一次对压力表提出了安全技术的要求。据此,在表壳中有内部超压例如弹簧管破裂时,压力表应制造得使表玻璃前的人员可不致被向前飞出的元件所伤害。符合本标准的压力表被视作安全压力表。随着这一要求显然提高了BAM的试验
1 Introduction and Development in the Past Two Decades Until 1973, the Federal Institute for Materials Research and Research (BAM) conducted tests on pressure reducers within the type tests of acetylene and oxygen cylinder pressure reducers for welding, cutting and the like The pressure gauge is tested according to DIN 8549. It was changed with the DIN8549 version published in April 1973. For the first time in this standard, safety gauges are required for pressure gauges. Accordingly, pressure gauges shall be constructed so that persons in front of the watch glass may not be injured by elements that fly forward when there is an internal overpressure in the case, such as a bourdon tube rupture. Pressure gauges meeting this standard are considered safety gauges. With this requirement clearly increased the BAM test