Slip-on Flange ASME B31.3 limitation

Slip-on Flanges Limits per ASME B31.3;  In the ASME B31.3 Piping Code, restrictions on slip-on flanges are specified as follows:  Use welding Double-Welded for  Service that causes Severe erosion, Crevice corrosion, and Cyclic loading  Service that is combustible, toxic and harmful to people  Service at temperatures below -101 C 2. Do not Slip-on Flanges with Service with high pressure than ASME B16.5 Flange Class 2500. 3. Avoid  Slip-on Flanges with  Service that changes the temperature up – downtime (, Many the Large Temperature Contact of Cycle), especially with  Flanges are not covered  Insulation, which will cause a change in the temperature of the  Flange and.  Pipe quickly and may lead to thermal fatigue cracking … Continue reading Slip-on Flange ASME B31.3 limitation

Corrosion Rate calculation (API 510, 570)

Corrosion Rate for New Vessel and Service Change per API 510;  According to API 510, “Corrosion Rate” for Pressure Vessel to be reinstalled or Pressure Vessel is changed Service Condition can be obtained. Use the Corrosion Rate of the Vessel that has the same or similar Service Condition The Corrosion Specialist is the person who estimates Or estimates the value from the published data such as API 581. Use the double thickness measurement to calculate the corrosion rate by the first time after the Vessel service for 3-6 months and the second time according to the appropriate period so that the value can be estimated Corrosion Rate.     Corrosion Rate for New Piping and Service Change … Continue reading Corrosion Rate calculation (API 510, 570)

What is Soil Corrosion

Soil to Air Interface – Zone of Corrosion on API 570 Piping; The area where the pipelines fall underground, or soil-to-air interface, is the area that has a high chance of external corrosion if Wrapping or Coating is damaged. Due to the difference in temperature, humidity and oxygen in the area, the API 570 stipulates that 6 inches above and 12 inches below the soil surface is the Soil-to-air Interface zone that should be Reviewed. Inspection of Soil-to-air Interface for Underground Piping;  For example, to monitor underground pipes ( Underground, Piping) in a pipe underground or Soil-to-air Interface by digging tube down … Continue reading What is Soil Corrosion

ASME B16.5 Flange Marking Explanation

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

What is PRV Set Pressure Tolerance

PRV – Set Pressure Tolerances per ASME Section I;  Pressure Relief Valve (PRV) is designed to be opened to release pressure (Relief Overpressure) at Set Pressure is set, which follows the Requirement of ASME Section I Power Boiler to Pressure Relief Valve (PRV) is a deviation ( of Tolerance) of Opening. Pressure from Set Pressure not exceeding the value in the table divided by Set Pressure of the PRV. Refer to: What is PRV pop test? (Popping test) Beside this term, there’s Blowdown and Overpressure Tolerance for PRV testing: Refer to: What is PRV blowdown? Continue reading What is PRV Set Pressure Tolerance

What is Backpressure testing of PRV?

PRV Backpressure Testing; Speaking of PRV testing, everyone knows (1) Pop Test or Set Pressure Test. It is a test whether PRV can open at Inlet Pressure as set and or (2) Seat Tightness Test, which we call Leak Test, which is the test of leakage between Disc and Seat of PRV after Pop Test. But for Closed Bonnet PRV in a closed system and does not require Fluid is leaking to the outside (Discharge to Closed System) must be made Backpressure Test on Requirement of ASME BPVC Section VIII, Div.1 The Backpressure Test is a compressed air or gas at a pressure of at least 2 bars. Go from the outlet side of the PRV to see if the Body, Bonet, Bellow, including Gasketed Joint and Connection are leak or not. Which we will use soapy water to … Continue reading What is Backpressure testing of PRV?

What is Profile Radiographic Test

Profile RT – U Tubes of Heat Exchanger;  For example, Profile RT (Digital) of the U Tubes ( -Heat Exchanger, ), which can be viewed Profile thickness Tube and Profile of Corrosion happens inside Tube Profile RT – Vent Nozzle of Acid Storage Vessel;  Example of Profile RT (Digital) of Vent nozzle of Sulfuric acid storage vessel which can see profile of nozzle thickness and profile of corrosion occurring within the nozzle . Profile RT – Socket Weld Gap; For Socket Weld of Piping, ASME Standard will require Gap , approximately 1.5 mm. This can be checked by the Profile RT (Digital) which made Profile RT can also be used to view a Profile of the thickness of the pipes, In. Service is also possible Profile RT for CUI Inspection ; Today share a Case Study, using Profile RT for monitoring Corrosion Under Insulation (CUI) by shooting rays through Insulation occupies Pipe Fitting … Continue reading What is Profile Radiographic Test

How to inspect steam trap on piping system

Steam Trap Inspection – Visual and Sound Summary for relieve open system; To check the Steam Trap, an Open System by observing ( the Visual ) function and sound ( A Sound) to indicate a malfunction of Steam Trap or not. Steam Trap Inspection – Visual;  Visual inspection of the steam trap is by looking at the external conditions to see if the steam trap has leaks at various points or not. Second, observe the behavior of the steam trap, which can indicate problems with the steam trap , such as lack of ventilation. Condensate water , large amounts of steam flow out of the steam trap, while the steam trap is closed, live steam ejects, etc Steam Trap Inspection – Overview; Monitoring Steam Trap to determine … Continue reading How to inspect steam trap on piping system

Steam Trap – Bimetallic type

Steam Trap – Bimetallic;  The Bimetallic Steam Trap uses the Thermostatic principle of the unequal expansion of two metals (Bimetallic) at high temperatures to open and close the Condensate drain valve . When high-temperature Steam comes in, the Bimetal disk will heat and bend. Causes the stem to move upwards to close the valve, but if condensate water gets trapped in a steam trap , the condensate ‘s water temperature will gradually decrease until the Bimetal disk comes back straight and causes the stem to slide down to open Valve. Continue reading Steam Trap – Bimetallic type