Category: PIPING

API 510, API 570 - PI, API Inspector, OIL & GAS, PIPING, SHIP SYSTEMSLeave a comment

Orifice Installation Matter in the piping system

Amarine Antonio

Regarding What is Orifice and its application, please refer to FLOW METER AND ORIFICE PLATE Introduction of Erosion on Piping downstream around Orifice installation area: Typical erosion in piping systems often occurs on the flow with the exclusion of turbulence, for example. Where the flow direction changes (elbow, tee) or downstream of the orifice in the pipe system. In addition, Flow is a two-phase (with solid or liquid particles) and has a higher speed of erosion. In the Orifice installation area, the Flow Orifice (FO) is used to block the flow and reduce the pressure of Steam down to allow it to become condensate, but since Steam has passed from Orifice that cannot be fully condensed in this area, the turbulence of Flow will exist.     Continue reading Orifice Installation Matter in the piping system

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Corrosion in Heat Exchanger

Amarine Antonio

There are 4 main reasons that cause corrosion in heat exchangers to need to be concerned during the inspection: Water impingement, Temperature, Vibration, Velocity. Refer to: Typical location of Corrosion on Heat Exchanger Cooling Water Corrosion in Heat Exchanger Tubes at High Water Temperature Zone; Another important factor affecting Corrosion in Heat Exchanger Tube Service at Cooling Water is the temperature. The area where the Cooling Water has a high temperature ( on the Outlet side ), there will be more fouling and corrosion than the low-temperature area. In the example, you can see from the corrosion that occurred in front of … Continue reading Corrosion in Heat Exchanger

API Inspector, CHEMICAL TANKER, Mechanical, PIPINGLeave a comment

Thermal Expansion affections in Piping system

Amarine Antonio

Linear Thermal Expansion of Pipping; One factor that must be considered in the design of the piping system is Piping Flexibility. Because our pipes will stretch itself when the temperature is increased, and shrink when the temperature is dropped. Therefore, our piping system must be flexible or able to move back and forth sufficiently to support elongation or shrinkage of pipe. In ASME B31.3 Process Piping Design determines the Linear Thermal Expansion of each material. To be used to calculate how much piping will stretch or shrink according to how much temperature has changed. The values ​​in Table C-2 measure … Continue reading Thermal Expansion affections in Piping system

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In service and maintenance welding defect

Amarine Antonio

In-Service Welding Concerns;  When welding, repairing or modifying pipelines or equipment that are currently being used (In-Service), the most worrying is the leak of the fluid inside. While or after doing On-line Welding. The two main reasons that cause the leak are: Burn Through: While welding at the melting area of ​​the welding, the strength will be reduced. We may not be able to withstand the Pressure at  Service value. Weld Cracking or Hydrogen Induced Cracking (HIC) from welding. The additional concern in welding is the cooling rate. Since the inside of the pipe or equipment has fluid flow, it may … Continue reading In service and maintenance welding defect

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Elbow corrosion in the piping system

Amarine Antonio

When we find that Erosion or Erosion-Corrosion Occurs in our piping system. Elbow area is one of the points where Flow hits and causes Erosion / Erosion-Corrosion. The simple way of looking at the wear (Eroded) or the thickness of the Elbow lost (Local-Thin Area) is the Grid UTM (Ultrasonic Thickness Measurement). This method will. This allows us to obtain both the profile of the remaining Elbow thickness and the ability to find the lowest thickness in the area by looking at the Thickness Profile obtained.   In another example of the Grid UTM area Outside radius of Elbow before the … Continue reading Elbow corrosion in the piping system

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Typical location of Corrosion on Heat Exchanger

Amarine Antonio

There are 4 main reasons that cause corrosion in heat exchangers to need to be concerned during the inspection: Water impingement, Temperature, Vibration, Velocity. Refer to: Corrosion in Heat Exchanger Likely Location of Corrosion – Heat Exchanger Tubes at Baffle;  Heat Exchanger Tubes in the Baffle Plates area are highly prone to corrosion. Due to the possibility of vibration of the Tubes causing friction with the Baffle (Vibration fretting) or Erosion from Fluid flow in Heat Exchanger For smaller tubes, The corrosion of the Tubes on the Baffle can be checked using a hammer. If the Tubes in the Baffle area is thin … Continue reading Typical location of Corrosion on Heat Exchanger

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Pipe with Dual Grade

Amarine Antonio

What is Dual Grade Stainless Steel Pipe: According to ASME BPVC Section II states that control the material characteristics such as mechanical properties (Mechanical Properties), chemical (Chemical, COMPOSITION), the Heat Treatment Through the provision of Grade supplies more than one Grade will be identified as Dual or Multiple Grade. For example, Dual Grade Stainless Steel Pipe, ASME SA-213 TP316 / 316L: Looking at the ASME SA-213 spec, you can see that 316L Low-Carbon Grade is defined to have the Carbon content lower than 316 Standard Grade, and at the same time requires that 316L have Min. Tensile Strength and Min. Yield Strength be lower. (Steel in general, if having less Carbon, will also have low Tensile Strength) This … Continue reading Pipe with Dual Grade

API 510, API Inspector, MACHINERY, Mechanical, PIPINGLeave a comment

What is Vibration induce cracking

Amarine Antonio

Vibration Induced Fatigue;  Vibration Induced Fatigue is a form of fracture due to fatigue, mechanical (of mechanical Fatigue) due to Dynamic load caused by vibration ( with Vibration) had done so at the risk of Vibration Induced Fatigue is a point there. High stress and severe shaking points. This type of damage is usually found at the small branch connections of Pressure Vessel and Piping, which are naturally high-stress points because they are discontinuous (see Stress Analysis) and are the receiving points. Vibrating force Thus, if the Support inadequate and the Small Branch Connection with Vibration ( for example, near … Continue reading What is Vibration induce cracking