The shielding effects of the wind loads acting on the industrial pipe racks are significant. It is urgent to investigate whether the wind loads of the pipe racks based on the current standard are safe or not. According to the common industrial pipe racks and the cracking furnaces located in the petrochemical plants， the shielding effects of the wind loads on the pipe racks have been investigated， based on high frequency force balance （HFFB） and high frequency pressure integration （HFPI） wind tunnel tests. The application scope of the standard is given by comparing with the current standard. The results show that the wind loads acting on the pipe racks specified in the current standard are safe. For the pipe racks with and without the pipelines， the wind loads obtained by the integral calculation method match with those drawn from the HFFB wind tunnel tests. Since the shielding effect of pipe rack on internal equipment is not considered， the wind load of cracking furnace obtained by the current code is obviously larger. Based on the HFPI wind tunnel tests， the shielding coefficients of the internal closed equipment shielded by the periphery pipe racks are given in the paper. Those coefficients can extend the scope of the applications of the integral calculation method.