Author: Amarine Antonio

Shipbuilding and welding professional.
API 510, API 570 - PI, BASIC THEORIES3 Comments

SMTS and Allowable Stress

Amarine Antonio

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

API 510, API 570 - PI, PIPING1 Comment

Gate valve testing and maintenance

Amarine Antonio

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

API 510, API 570 - PI, CORROSION, OIL & GAS5 Comments

Erosion in Refinery, Petrochemical Plant

Amarine Antonio

Case I: Erosion in Pipeline Branch of line Medium pressure (MP) steam is separated to Steam trap occurs near Elbow ( the Elbow) at the point of impact of the Flow by Steam flow in Line that runs Steam trap that resembles a Two-phase.   Case II: Erosion at the opposite tee fitting of the Low-pressure (LP) steam condensate pipe is caused by the two-phase flow (Flash steam + Liquid condensate) from the pipes that condensate from the steam trap that is combined. Case III: When Liquid Condensate runs through the Control valve, some are turning to Flash steam becomes Two-phase flow and flow turbulence ( Turbulent) resulted from Erosion , especially at the point of impact on the joints of the various (Elbow, Tee).   Continue reading Erosion in Refinery, Petrochemical Plant

API 570 - PI, Shipbuilding A-ZLeave a comment

Pressure Safety Valve Calibration, Maintenance

Amarine Antonio

A Simple Pressure Safety Valve Calibration Procedure One of the simplest but most important instruments that I encounter which are used not for displaying or monitoring the process, but for safety, it is the pressure safety valves. When I was just starting out as a cal tech, looking at it installed in a tank makes me curious about its usage. You cannot see any actions or output display as a sign of its operation. In this post, I will present the following: What is a safety valve? Its difference with a relief valve Why do we need to calibrate a … Continue reading Pressure Safety Valve Calibration, Maintenance

OIL & GAS, Shipbuilding A-Z3 Comments

What is Load test Safety Factor and Proof Test for Lifting devices?

Amarine Antonio

What is the safe working load (SWL)? Safe Working Load (SWL) is the limiting safety factor to lift and carry any load safely. It must be clearly marked on any lifting device (hoist, lifts, lifting machines, and lifting tackles). Marking System of Safe Working Load Lifting equipment should have a tally plate indicating the Safe Working Load. The tally plate also indicates the identification number which can be mentioned in the test certificate held by the user. It should also indicate the date of the last inspection. Safe Working Load ( Or WLL) of different types of sling are given in … Continue reading What is Load test Safety Factor and Proof Test for Lifting devices?