Why does a Steam Heat Exchanger or any Steam Heater have a Steam Trap: 1st reason: On Outlet line, Steam-out of the Heat Exchanger may also heat or condensated at Steam outlet, therefore, a Steam Trap at Outlet line of Heat Exchanger for trap the Steam to condense into water before forwarding it to condensate main line (Saving Steam). 2nd reason: The Steam on the Heat Exchanger may be Water Condensate contaminated, so they have to set Steam Trap with Steam Inlet line to prevent damage from Two-phase flow steam erosion occurred in Heat Exchanger. (Corrosion/Errosion Protection) Example of Steam … Continue reading Steam trap design in piping system
ASME B16.5 Flange Marking; Marking (Stamp) on the flange according to the requirements of the AMSE B16.5 Pipe Flanges and Flanged Fittings Standard must include the size of the Flange, Flange Rating Class, the symbol “B16” or “B16.5”, Material Specification, and Manufacturer’s name. 1: Size of Flange (NPS), Ex. 4″; See: PIPING/TUBING CONFIGURATIONS 2: Class of Flange, Ex. 150, 300, 600; See: FITTING PRESSURE RATING CLASS 4: Standard, Ex. B16 or B16.5 5: Material specification, Ex. SA A182 F304/304L; See: ASME B16.5 FLANGE MATERIAL GROUP Others: 6. Heat No, Ex: CR47 7. Trade Mark, Ex: CE, KOR, VN ect., Continue reading ASME B16.5 Flange Marking Explanation
Hydrostatic Test Pressure vs MAWP of Section VIII Vessels; An example of Hydrostatic Test Pressure compared to the MAWP of Pressure Vessel ( in the form of Shell & Tube Heat Exchanger) designed according to ASME Section VIII Div.1. What is Hydrostatic Test Pressure for Section VIII Vessels; The Hydrostatic Test of Pressure Vessel according to the ASME Section VIII Div.1 must be done at a pressure not less than 1.3 times of the Maximum Allowable Working Pressure (MAWP) of the Vessel multiplied by the Stress Ratio to compensate for the strength of the material. In case of use at high temperatures ( when Hydrotest is made at Ambient Temp.) , The Stress Ratio is the ratio of the Allowable Stress of the material to … Continue reading Test Pressure vs MAWP (ASME VIII)
PRV Testing – Trevitest (Principle); Trevitest Test Set Pressure of the Pressure Relief Valve (PRV) with On-Line while PRV are In-Service without adding (Build up) the pressure in the whole system approaching the Set Pressure. The Trevitest test kit uses the Hydraulic Lift Assist Device to help push the spindle of the PRV to overcome the spring force without increasing the pressure in the system and calculate the set pressure of the PRV using the pressure in the system. PRV Testing – Trevitest (Tools Setup); Examples of tools and installation of Trevitest test kits installed on the Pressure Relief Valve at the site: PRV Testing – Trevitest (Result Interpretation); Interpretation of Trevitest test results is done by using the software that comes with … Continue reading What is PRV valve Trevitest ?
PRV Testing – Field Test; Test Set Pressure and Seat Tightness Test of Pressure Relief Valve (PRV) at the venue (Field Test) can be performed using a kit for compressed inward, Inlet performed on Nozzle of PRV, which will make the case that PRV is large, located on a high ground, difficult to transport. Refer to: What is PRV pop test? (Popping test) Continue reading What is PRV Field Test?
The free pdf file of Thirty-one (31) Module 10 Q&A model of 2000 version: Module 10 AWS CWI QUESTIONS ANSWERS (pdf) DOWNLOAD The Below Fourty-four (44) Questions are model of 2018 version Module 11: NDT and Visual inspection Q11-1 Which … Continue reading AWS CWI Questions and Answers (Module 11)
The free pdf file of Nineteen (19) Module 9 Q&A model of 2000 version: Module 9 AWS CWI QUESTIONS ANSWERS (pdf) DOWNLOAD The Below Twenty (20) Questions are model of 2018 version Module 10: Welding Discontinuities Q10-1 A discontinuity is: … Continue reading AWS CWI Questions and Answers (Module 10)
The Below Seventy-three (73) Questions are model of 2018 version Module 9: Welding Processes Q9-1 Of the following, which is not a necessary requirement for a welding process? a. source of energy b. electricity c. means of shielding molten metal … Continue reading AWS CWI Questions and Answers (Module 9)
The Below Nine (09) Questions are model of 2018 version Module 8: Welder Qualification (WPQ) Q8-1 Who is normally responsible for the qualification of welding procedures and welders? a. welder b. architect c. welder’s employer d. independent test lab e. … Continue reading AWS CWI Questions and Answers (Module 8)