Excerpts of this standard practice may be quoted with permission. Mss standard marking system for valves, fittings, flanges. Other sizes are available o depth of blind tapped holes in chest area. Mss sp252008 standard practice developed and approved by the manufacturers standardization society of the valve and fittings industry, inc. Mss sp97 astm a105 weldolet,a105n weldolet a105 threadolet. The current version of mss sp61 was released in 20. Some steel items may be specially fabricated to fit other pipe diameters i. Mss sp81 na mss sp5 na mss sp 81 mss sp 81 150 or 250 psi cwp 100 psi cwp 285 or 740 psi asme 285 or 740 psi asme 150 psi cwp or 150 psi asme 150 psi cwp driptight driptight mss sp5 or driptight mss sp5 or driptight mss sp 81 driptight 265f 129c 300f 149c 450f 232c 450f 232c f 537c 350f 177c. Mss sps going though the canvas process for ansi accreditation sp105 instrument valves for code applications, new ans sp122 plastic industrial ball valves, new ans sp114 corrosion resistant pipe fittings, revised ans sps accredited by ansi sp25 standard marking system sp44 steel pipeline flanges. Additionally, resilient seated knife gate valves and slide knife gate valves are also not covered under mss sp81.
Mss sp81 2017 stainlesssteel or stainlesssteellined, bonnetless, knife gate valves with flanged ends. Add standard and customized parametric components like flange beams, lumbers, piping. Federal specification aa1192a type 7, msssp69 type 7. The et model knife gate is a unidirectional lug type valve designed according to msssp81 and tappitis 405 for industrial service applications. Other applicable standards as the performance of many of our knife gate, slide gate and slurry valve products. Mss sp 81 2017 edition, january 1, 2017 stainlesssteel or stainlesssteellined, bonnetless, knife gate valves with flanged ends. It was developed for the purpose of providing a uniform means of testing valves commonly used in the full open and full closed type of service. Ansi mss sp 58 manufacturers standardization society. For soft seated knife gate valves, the maximum leakage is 4 mlminin.
Manufacturers standardization society of the valve and fittings industry, inc. Jbt8691, mss sp81, resilient wedge, alloy, stainless, carbon steel, flanged ends, 2 48 inch, class 150 lb, or as customer required. Sizes above 24 are not covered under this standard. Mss standard sp61, from the manufacturers standardization society, establishes leakage allowances and provides guidance for testing valves typically used in full open and full closed service, such as check, isolation, and stop valves. N cylinder diameter not actual outside dimension note. There are two things that the test standards have in common. V alve testing standards msssp61 ansi fci 702 every valve testing standard has an acceptable leakage rate.
Mss sp 97 weldolet astm a105,a105n weldolet,astm a350 lf2. Astm a105 also known as asme sa 105 covers seamless forged carbon steel piping components for use in pressure systems at ambient and highertemperature service in pressure systems. Ansimss sp58 manufacturers standardization society. Manufacturers standardization society of the valve and fittings industry mss sp77 guidelines for pipe support contractual relationships. Mss sp62017 standard finishes for contact faces of pipe. Report mss sp81 please fill this form, we will try to respond as soon as possible. Seismic wind dynamic design, selection, and application. Mss standard practice sp61 ii foreword this standard practice for pressure testing of valves was originally adopted in 1961. All pipe supports in this section are sized to fit schedule 4080 pipe unless otherwise noted. Mss sp812006a stainless steel, bonnetless, flanged knife gate valves manufacturers standardization society 01jan2006 9 pages.
Pipe hangers and supports selection and application. Mss sp62017 standard finishes for contact faces of pipe flanges and connectingend flanges of valves and fittings is available on the ansi webstore. Mss sp 6 standard finishes for contact faces of pipe flanges and connectingend flanges of valves and fittings published by mss on january 1, 2017 this standard practice pertains to the finish of gasket contact faces of pipe flanges and connectingend flanges of valves and fittings. Sizes above 24 are subject to the to the individual manufacturerscustomer, internal design specifications and.
This standard practice covers all stainlesssteel or stainlesssteellined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size nps 2 dn 50 through nps 36 dn 900. Design and testing knife gate valves sure flow equipment inc. V alve testing standards mss sp 61 ansi fci 702 every valve testing standard has an acceptable leakage rate. This standard practice covers all stainlesssteel or stainlesssteellined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size nps 2. Valves, valve actuators, valve modification, pipe fittings, pipe hangers, pipe supports, flanges and associated seals. The design of the body and seat assures nonclogging shutoff on suspended solids in industries such as. In the primary table of the standard, the appropriate serrations of the standard finishes for these categories are listed. Simple online access to standards, technical information and regulations. Astm a126 cl b cast iron astm a536 ductile iron astm a395 ductile iron mss sp71. Pipe hangers and supports materials, design, and manufacture. This mss standard practice was developed under the consensus of the mss technical committee 105 and the mss coordinating committee. This standard practice establishes the material, design, fabrication, and inspection criteria to be used in the manufacture, selection, and.
Manufacturers standardization society of the valve and. Ansimss sp69 manufacturers standardization society. List of mss dimensional standards the piping engineering world. Voelker a thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of master of science major. This standard practice establishes the material, design, fabrication, and inspection criteria to be used in the manufacture, selection, and application of standard types of bracing assemblies. The et model knife gate is a unidirectional lug type valve designed according to mss sp 81 and tappitis 405 for industrial service applications.
As per the mss sp61 standard, the maximum allowable leakage of metal seated knife gate valves is 40 mlminin. Ansi mss sp 69 manufacturers standardization society. Valve standards international standards for valves in piping systems. We are the manufacture of forged weldolet,forged threadolet.
Engineering toolbox sketchup extension online 3d modeling. Mss sp812017 stainlesssteel or stainlesssteellined, bonnetless, knife gate valves with flanged ends. Manufacturers standardization society of the valve and fittings industry mss sp 77 guidelines for pipe support contractual relationships. Soft seated knife gate valves are bidirectional with zero leakage to 10 bar150 psi in the preferred direction and limited tightness in the non. B model na facetoface per tappimsssp81 b1 model a1 special wide facetoface b2 model w1 facetoface per msssp5 k cylinder port size 412 typ. The content of this standard practice is the result of the efforts of competent and concerned volunteers to provide an effective, clear, and nonexclusive specification that will. Mss announces that sp 982020, protective coatings for the interior of valves, hydrants, and fittings, has been revised and published. Standard marking system for valves, fittings, flanges, and unions. Mss sp 154 low pressure knife gate valves for double block and bleed published by mss on january 1, 2018 scope and field of application this standard practice covers stainlesssteellined, cast, or fabricated bonnetless, low pressure knife gate valves that are designed and manufactured to serve as a. The purpose of this standard practice is to outline the limitations and requirements of.
Sizes above 24 are subject to the to the individual manufacturerscustomer, internal design specifications and testing. Mss sp 78 gray iron plug valves, flanged and threaded ends. Mss sp812017 stainlesssteel or stainlesssteellined. Msssp81 na msssp5 na mss sp81 mss sp81 150 or 250 psi cwp 100 psi cwp 285 or 740 psi asme 285 or 740 psi asme 150 psi cwp or 150 psi asme 150 psi cwp driptight driptight msssp5 or driptight msssp5 or driptight mss sp81 driptight 265f 129c 300f 149c 450f 232c 450f 232c f 537c 350f 177c. Manufacturers standardization society of the valve and fittings industry mss sp 89 pipe hangers and supports fabrication and installation practices. Federal specification aa1192a type 7, mss sp 69 type 7. The existence of an mss standard practice does not in itself preclude the manufacture, sale, or use of products not conforming to the standard practice. Specific guidelines are detailed in the mss sp62017 standard. Quantitative surface inspection methods for metal castings.
An mss standard practice is intended as a basis for common practice by the manufacturer, the user, and the general public. See pipe data charts on pages 294 thru 300 for proper size selection. Unidirectional mss sp81 lug type knife gate valve for general industrial applications. Mss sp812017 american national standards institute. Bidirectional mss sp81 lug type knife gate valve for general industrial and water applications. Cast iron gate valves api 598 iso 5208, mss sp70 bronze gate, globe and check valves mss sp80 steel gate, globe and check valves larger than nps 24 asme b16. The chart on page 2 displays the matrix of products and how they apply to mss sp81. Mss sp70 cast iron gate valves, flanged and threaded ends valve design, manufacturing and testing requirements, including pressure and temperature ratings. Mss sp81 in scope, so in these cases, we apply mss sp81 where it makes sense for the product and potential application. The manufacturers standardization society mss of the valve and fittings industry is a nonprofit technical association organized for development and improvement of industry, national and international codes and standards for.