Determination of the hydrostatic test pressure for boiler systems
Thread Content
For steam boilers, the determination of the hydrostatic test pressure for their boiler systems (with a maximum operating pressure of 2.3 MPa for the boiler drum; this boiler system does not have a reheater or a split economizer, and the diameter of the boiler drum is DN1800): 1. According to Article 207 in Chapter 10 of the Steam Boiler Regulations, the test pressure should be calculated based on the pressure of the boiler itself, which would be 1.25 x 2.3 = 2.875 MPa. However, the hydrostatic test pressure specified in the manufacturer’s drawings is 2.94 MPa – it is unclear what considerations led to this value 2. This boiler system includes a hot water section; if it is considered as such, according to the safety regulations for hot water boilers, the value should also be 1.25P. Could someone explain the reasons behind this?
Ask the boiler manufacturer; they might tell you why. Here’s an address for you; just register to access it. It deals with a comparison of China’s regulations on pressure testing versus those in other countries, and it tells you whether the boiler you’re using was manufactured by a foreign company! http://www.gotoread.com/s/e/?vo=3677&p=65 Advanced paid VIP search http://www.cqvip.com/asp/userlink.asp?re=77421
It is generally calculated at 1.25P; when the maximum operating pressure is 2.3 MPa, the hydrostatic test pressure is 2.875 MPa. If 2.3 MPa is used, a superheater is present, with the outlet pressure of the superheater being 2.3 MPa. In that case, the operating pressure in the boiler drum is higher than that in the superheater (to overcome the resistance from the boiler drum to the superheater), so manufacturers use 2.35 MPa as the maximum operating pressure for the boiler drum. Consequently, the hydrostatic test pressure is 2.94 MPa (2.9375 MPa). Conducting the hydrostatic test according to the diagrams will ensure accuracy! Hehe! .
Agree with the answer above; I’ll give it a try
According to the standards, JB/T1612