Normal maximum working pressures for steel tubes - in psi and kPa. Rapidly closing or opening valves - or starting stopping pumps - may cause pressure transients in pipelines known as surge or water hammer. The Engineering ToolBox provides a wide range of free tools, calculators, and information resources aimed at engineers and designers.

2020年4月15日 · The maximum allowable working pressure (MAWP) is the maximum pressure at which a flange may be operated at given temperature and is normally expressed in terms of the flange rating. In the case of ASME B16.5 flanges, as the temperature increases, whilst the class remains the same (i.e. 150#, 300#, 400#, 600#, 900#, 1500# and 2500#), the maximum ...

The Maximum allowable non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings according the American National Standard ANSI B16.5 are given in the table below. Flanges and their Fittings are a common feature in the process plants.

估计大部分人不知道说的是什么意思，我改一下这样描述：当设备（按第一种思路设计）不计算mawp，在计算水压试验压 力时，公式里的mawp数值换成设计压力的数值，也就是mawp可假设等于设计压力，这就是ug99b和ug99b（34）的区 别。

2014年8月18日 · MAWP: maximum allowable working pressure 最大允许工作压力。 是按照设计标准(ASME等)计算的，取受压能力最弱的部分材质所能承受的最大压力。 由于容器制造经常使用标准管材，一般说来壁厚大于计算所得数值，从此角度来说 MAWP 大于容器的设计压力。

2021年5月26日 · The ASME B16.5 standard provides the 7 pressure classes for flanges. These are – 2500, 1500, 900, 600, 400 (less common today), 300 and 150. Class 75 also exists in ASME B16.47 Series B large diameter. The rating for flanges in terms of pressure-temperature represents all the material groups organized within 44 tables.

2017年9月20日 · The most common rating classes defined by the American National Standards Institute (ANSI/ASME B16.5) and the American Society of Mechanical Engineers (ASME) include Class 150, 300, 600, 900, 1500, and 2500, with the number roughly indicating the maximum pressure the flange can withstand at the temperature of 100°F (38°C).

A typical drawing for Class 900 threaded flange with raised face (RF), ASME B16.5.

ASME/ANSI B16.5-1996 Pipe Flanges and Flanged Fittings - Class 900 Flanges - outside and inside diameters, bolt circles, numbers and diameters of bolts for Weld neck, Threaded, Slip-on, Lap joint, Socket weld and Blind flanges. Carbon and stainless steel qualities according ASME B16.5 Table 1A.

Maximum allowable non-shock pressure (psig)and temperature ratings for steel pipe flanges and flanged fittings according the American National Standard ANSI B16.5 - 1988.