[vc_row][vc_column][vc_toggle title=”What is the D100 and how is it related to the API screen designation?” el_id=”1467363130474-5cbc143f-3f90″]The D100 value represents the diameter of the coarsest particle (in microns) which will pass through the screen during a dry laboratory test and is a single number, not a range of sizes.
The API screen designation for a screen is the API-defined range of sizes into which the D100 value falls. Some of the coarser size classes span quite a large range of D100 values.[/vc_toggle][vc_toggle title=”What does/doesn’t the D100 tell us?” el_id=”1467363235513-d3e2a380-9232″]The D100 value is the finest particle diameter at which the screen no longer sends 100% of the particles to the discard stream. This is also the coarsest particle that will pass through the screen.
The D50 value is the particle size at which the screen sends 50% of the particles to the “overs” (discard), while the remaining 50% report to the “unders” (undersized stream) and the D100 should not be compared in any way. The D50 was interpreted as the micron size where a screen makes a 50/50 split.
The API RP 13C D100 is a very specific value determined from a carefully-controlled laboratory procedure so that any laboratory should measure the same value for any given screen cloth.[/vc_toggle][vc_toggle title=”Why is there such a great variance between the old and new screen labeling values?” el_id=”1467363328192-85ee1d88-fdcd”]The biggest variation is due to the shift from the D50 value to the D100 value.
The previous test procedure for screens, API RP 13E, measured the distribution of the screen holes as measured by light, not solids. Subsequently, the screens were labeled using the D50, D16 and D84 separation curve.
The current test procedure, API RP 13C, measures the coarsest particle which passes through the screen, using a much more accurate and repeatable test method. The screens are now labeled using the D100 size criteria.[/vc_toggle][vc_toggle title=”Will a screen with a D100 of 110 microns remove solids finer than 110 microns?” el_id=”1467363331915-3fdb9971-97ea”]Yes, more than half of the particles that are coarser than D50 and finer than D100 will report to the overs. A significant portion of the particles finer than D50 will also report to the unders. (By definition, every particle classified in the D100 size or coarser will report to the overs as expected.)[/vc_toggle][vc_toggle title=”What is API RP 13C (ISO 13501)?” el_id=”1467363334219-7eec132c-f747″]A new physical testing and labeling procedure for shaker screens. To be API RP 13C compliant, a screen must be tested and labeled in accordance with the new recommended practice.
Two tests were devised: cut point and conductance. The tests describe a screen without predicting its performance and can be performed anywhere in the world.
After identifying the cut point and conductance, complying with API RP 13C requires application of a permanent tag or label to the screen in a position that will be both visible and legible. Both cut point expressed as an API number and conductance shown in kD/mm are required on the screen label.
Internationally, API RP 13C is ISO 13501.
The new procedure is a revision of the previous API RP 13E, which was based on optical measurements of the screen opening using a microscope and computer analysis. Under API RP 13E, screen designations were based on individual manufacturer test methods, producing inconsistent labeling.[/vc_toggle][vc_toggle title=”What is the practical value of RP13C to the end user?” el_id=”1467363336486-fc37cc08-7dda”]a. RP13C provides an unequivocal procedure and benchmark for comparing different screens.
b. The primary intent of RP13C is to provide a standard measuring system for screen[/vc_toggle][vc_toggle title=”Should I screen with a finer screen now if what used to be called a ‘200 mesh’ screen is now labeled API 120?” el_id=”1467363338628-a7e79f66-139d”]Users are advised to determine the screens that work best in their applications regardless of what the new API Screen Number happens to be.[/vc_toggle][vc_toggle title=”Should I use the old screen number or the new API Screen Number when ordering replacement screens?” el_id=”1467363725852-1090eab5-51b0″]Although some companies are changing their part numbers to reflect their conformance to RP13C, others are not. It is therefore best to specify the RP13C value you want.[/vc_toggle][vc_toggle title=”Why is there such a large variance between the old and new labeling values?” el_id=”1467363729764-88467a81-3b0e”]a. The biggest variation is due to the shift from using D50 to D100.
b. The previous test procedure (RP13E) measured the distribution of the apertures in the screen.RP13C uses a physical and repeatable test using actual solids (dry aluminum oxide) which measures the coarsest particle that can pass through the screen.[/vc_toggle][vc_toggle title=”Will a screen with a D100 of 172µ remove solids finer than 172µ?” el_id=”1467363838972-67c847fd-4be6″]By definition, every particle of the D100 size or coarser will be discarded. b. In practice some portion of solids finer than 172µ may be removed.[/vc_toggle][vc_toggle title=”What does the API Screen Number NOT tell us?” el_id=”1467363843544-797dad59-ed8d”]The API Screen Number is a single number which defines solids separation potential under specific test conditions. It does NOT define how a screen will operate on a shaker in the field as this will depend upon several other parameters such as fluid type & properties, shaker design, operating parameters, ROP, bit type, etc.[/vc_toggle][vc_toggle title=”Can I put my logo on the shaker screen?” el_id=”1467364533449-12e9710c-b88e”]It is our specialty! Put any logo you like on your shaker screens.[/vc_toggle][vc_toggle title=”Where are your products made ?” el_id=”1467363845594-d547a123-bd89″]All of our products are made at our factories in China.[/vc_toggle][vc_toggle title=”How do we pack shaker screens properly?” el_id=”1468657060779-22bcd424-4182″]Packing shaker screens is based on certain shaker screen type. Cater for most customers’ demand we usually pack the framed screen as 1 panel per carton, while the hook strap ones will be 2 panels per carton. And almost screen panels will be packed on poly wood pallets or boxes with bundle belt. Every package will be marked with package detail for convenient quantity re-check. Packages will be seaworthy and airworthy to avoid any damage or loss.[/vc_toggle][vc_toggle title=”How to increase PMD screen life?” el_id=”1468657058798-deea823e-3cd8″]MD screen is the corrugated shaker screen with more effective filtration area. It really benefits much on shaker performance during solids control. Some clients comment, the pyramid shaker screen seems shorter life. Please do remember, when we utilize the PMD screen panel we have to decrease the shaker deck angle. If possible, we kindly suggest combine flat panel and PMD panel together on one shaker. Put the flat ones at solids discharge end. This will help much to save PMD screen life and, achieve higher efficiency than all flat panel fit on shaker.[/vc_toggle][/vc_column][/vc_row]