Category: API 510

API 510, API 570 - PI, PIPING1 Comment

What is Balanced Bellow of PRV

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Balanced Bellow PRV;  Balanced Bellow Pressure Relief Valve is The Conventional PRV with Bellow for reducing the impact of Backpressure from the Outlet of PRV makes PRV can be turned off as the Set pressure setting. Refer to: What is Backpressure testing of PRV? Refer to: What is Cold Differential Test Pressure (CDTP) on Conventional vs Bellow PRV To use Balance bellow PRV, open a vent hole on the Bonnet to monitor the leak of the Bellow and to reduce the impact of Backpressure on Set pressure in case of Bellow leak: How Balanced Bellow Work; Balanced Bellow is able to eliminate the impact of the Backpressure because the pressure from the Backpressure is applied to both sides of the Bellow and is offset.   Continue reading What is Balanced Bellow of PRV

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What is Test Gag of Pressure Relief Valve

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Test Gag of Pressure Relief Valve;  Test Gag is a bolt used for the spindle block of the pressure relief valve (PRV) to allow the PRV to be closed during the pressure test. The bolt should be tightened when the system has 80% of the pressure used. test (test pressure) to ensure that the PRV is closed at the test Pressure: Continue reading What is Test Gag of Pressure Relief Valve

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Conventional Pressure Relief Valve Component (Intro)

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“Conventional” Pressure Relief Valve Component;  Conventional Pressure Relief Valve (PRV) has a duty to protect Vessel not to have the pressure exceeded ( Overpressure) by PRV will open to release pressure from the system when the voltage is greater than the pressure of the spring of PRV for Conventional Spring. -loaded PRV has the following components.   Continue reading Conventional Pressure Relief Valve Component (Intro)

API 510, API 570 - PI, CORROSION, PIPING1 Comment

Steam erosion on Flanges (Samples)

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Steam Erosion at Flange / Gasket Face (Case Study 1);  Erosion (Erosion-Corrosion) by Steam area Flange / Gasket Face of Tubesheet of Shell and Tube Heat Exchanger, so remember to check the area. Flange / Gasket Face thread. Steam Erosion at Flange / Gasket Face (Case Study 2);  Another Case study of the Steam Erosion at Flange face (Gasket face) of Top Outlet Nozzle of Steam Tower. Continue reading Steam erosion on Flanges (Samples)

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What is Cooling tower in refinery plant

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Relate topic: What is CUI – Corrosion under insulation and on Cooling tower Cooling Tower Work;  Cooling Tower to do evaporation of some water in the water system ( the Cooling the Water) cool by spraying (for Spray). Hot Cooling Water to flow through the air against the Packing to increase the contact surface between water and air. When the water and the air come in contact with each other, some water will evaporate and cool the cooling water. Cooling Tower Component;  The main components of Cooling Tower include exhaust fans, pipes and fittings for the Spray Water Cooling water, Pack to … Continue reading What is Cooling tower in refinery plant

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What is CUI – Corrosion under insulation on Cooling tower

Amarine Antonio

CUI Locations Guideline in Vertical Vessel;  The potential area for Corrosion Under Insulation (CUI) is the area where water can be trapped in the insulation or fireproofing. For the vertical vessel, there is a risk point as in the picture. Critical Factors a) It affects externally insulated piping and equipment and those that are in intermittent service or operate between: 1) 10°F (–12°C) and 350°F (175°C) for carbon and low alloy steels, 2) 140ºF (60°C) and 400ºF (205°C) for austenitic stainless steels and duplex stainless steels b) Corrosion rates increase with increasing metal temperature up to the point where the water … Continue reading What is CUI – Corrosion under insulation on Cooling tower

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Piping erosion by Steam

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Erosion by Steam and Condensate;  Erosion or erosion by Steam and Steam Condensate is caused by Steam / Condensate In our system, a two-phase state occurs: Steam vapor is mixed with condensate water. The reason why the two-phase is caused by: The steam loses heat and energy from running through pipes causing condense to be liquid condensate. Using Steam to heat exchangers in Heat exchanger devices causes liquid condensate to occur. Condensate water in the system is able to evaporate ( flash ) to steam vapor when the pressure in the pipe changes from high to low pressure, such as at the Steam Trap outlet. Continue to … Continue reading Piping erosion by Steam

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SMTS and Allowable Stress

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Specified Minimum Tensile Strength (SMTS) The ASME Code, Specified Minimum Tensile Strength or SMTS mean stress (Stress), the lowest that can make a material damaged or torn apart by tension ( The Tension), which is made from tensile tests ( Tensile Test,. ), also known as Ultimate Tensile Strength (UTS).  How to test and verified the SMTS of weldment: Tension Test Acceptance Criteria for Welding Procedure Qualification Allowable Stress “S”;  For ASME Code,   pressure vessel or pipe design, the code uses the Tensile stress of each material specified in the calculation. Stress that the code specifies or allows is called Allowable Stress “S”, which … Continue reading SMTS and Allowable Stress

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Gate valve testing and maintenance

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1- Purpose of using Gate Valve on stream Gate Valve is used to open and close the flow only. Not commonly used in flow control with the following components. 2- Operation (open-closed) of Gate Valve 3- The Hydrostatic Test for Gate Valve requires 3 parts, Shell, Seat, and Backseat  The hydro-testing according to API 598. The valve standard is ASME B16.34 ***Gate Valve – Hydrotest Backseat;  The Hydrostatic Backseat Test must be tested at a pressure of not less than 1.1 times the Maximum Operating Pressure by fully opening the valve and releasing the gland of the gate valve to check for leaks through the Backseat. ***Gate Valve – Hydrotest Shell;  Hydrostatic Shell Test must be tested at a pressure … Continue reading Gate valve testing and maintenance