Manufacturers standardization society mss is the only organization in the world dedicated exclusively to the technical needs of the valve and fittings industry. Standard practice sp55 quality standard for valves, flanges and fittings and other piping components visual method feb1001 inspection and testing. Mss sp55 visual method the mss sp55 method uses images as a means. The mss sp55, quality standard for steel castings for valves, flanges, fittings, and. My reading on qm 07 valve inspectionreading iii api6d. Comparisons pub lished in table 1 represent the mss interpretation. Quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface irregularities standard practice developed and approved by the manufacturers standardization society of the valve and fittings industry, inc. Ansimss sp552011 quality standard for steel castings for valves, flanges and fittings and other piping components visual method for evaluation of surface irregularities manufacturers standardization society 01oct2011 23 pages more details.
Manufacturers standardization society of the valve. The mss sp55, quality standard for steel castings for valves, flanges, fittings, and other piping compo nents visual method for evaluation of surface irregularities, was originally adopted in 1961. Reference photographs in mss sp55 are to be used to determine acceptability of castings. Mss sp552011 quality standard for steel castings for valves, flanges and fittings and other piping components visual method for evaluation of surface irregularities. Quality standard for steel castings for valves, flanges and fittings and other piping components visual method for evaluation of surface irregularities gives series of reference photographs of surface irregularities common to steel pressure castings and illustrations of generally acceptable and rejectable quality. More than 2000 of these sets of comparators are used around the world by multinational companies and small enterprises. Find out how your company can benefit from plm built on salesforce. The mss sp55, quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface. The acceptance criteria set by the customer for these methods must be interpreted by the manufacturer correctly in order to meet the design specifications. Visual inspection the visual inspection shall be performed based on acceptance criteria being addressed at mss sp 55 visual method for evaluation of surface irregularities. Mss sp 55 manufacturers standardization society of the valves and fittings industry. The standard suggests des ignating acceptance criteria on drawings. Pressure testing of valves copeland industries, inc. Current visual inspection standards are qualitative and make it difficult to interpret these standards.
The sp 55 provides some reference photographs for visual inspection. Inspector should run through precisely the acceptance criteria they follow. Often times, the interpretation of what is acceptable. Ansi mss sp552011 quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface irregularities reference version not for inspection standard practice developed and approved by the manufacturers standardization society of the valve and fittings industry, inc. Quantitative surface inspection methods for metal castings by michelle m. Quantitative surface inspection methods for metal castings. This standard practice and its supporting mss cast surface comparator may be applied to surfaces formed by any casting method.
Mss standard marking system for valves, fittings, flanges. Production pressure tests verify the pressure containing capability of production units. New mss sp 55, quality standard for steel castings for. Mss sp 55 quality standard for steel castings for valves. This surface quality standard practice provides criteria for the visual and tactile evaluation of cleaned ascast surface finishes of components manufactured from castings. 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 provides methods and acceptance standards for the film method of radiographic examination of steel castings for valves, flanges, fittings, and. Standards written by mss address valves, valve actuators, valve modification, pipe fittings, pipe hangers, pipe supports, flanges, and associated seals.
Quantitative surface inspection methods for metal castings by. Scrata surface comparators castings technology international. Ansi mss sp 55 casting metalworking steel free 30day trial. The specification provides 5 photos for each defect type numbering from a to e. More stringent criteria may be specified in the engineering design. Comparisons published in table 1 represent the mss interpretation. The durable plastic comparator plates, actual replicas of relevant characteristics. If the purchaser does not provide acceptance criteria for visual examination is same as qualification casting. Visual method for evaluation of surface irregularities, was originally adopted in 1961.
Quality standard for steel castings for valves, flanges. This standard practice is intended to supplement the requirements of astm specifications a216a 216m, a217a217m, a351a351m, a352a352m, a3891a389m, a487a487m, and a744a744m and to provide a series of reference photographs typical of the various surface irregularities common to steel pressure castings and illustrations of generally acceptable and generally rejectable quality. Standards and codes are written and revised by 25 technical committees and address topics such as valves. Mss sp55 2011jan01 qualty standard for steel castngs for valves flanges fttngs and other ppng components vsual method for evaluaton of surface rregulartes. Additionally, the standard specifies criteria for the height and frequency of surface abnormalities through a series of grids of a controlling square inch. Click here to purchase the full version from the ansi store. Porosity in castings metal and metallurgy engineering.
These provide a practical and functional alternative to photographic representation of casting surfaces in standards such as mss sp552001. Mss sp 55 pdf download for mac allows you to search through the tags on your computer, either the existing ones from premavericks or the new osx. The mss sp55, quality standard for steel castings for valves, flanges, fittings, and other piping components. The mss sp55, quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface irregularities, was originally adopted in 1961. Description download mss sp 55 2006 scaned free in pdf format. Quality standard for steel castings for valves, flanges, fittings, and other piping components.
Quality standard for steel castings for valves, flanges, fittings and other piping components visual method for evaluation of surface irregularities. Inspection and test plan for valve before manufacturing activity by no. It was developed for the purpose of providing the industry with a uniform means for identifying various types of casting surface irregularities. Type 1 unacceptable type 212 a and b are acceptable all others are unacceptable results are to be documented api 20a quality control. Castings are evaluated today when api rp591 testing is requested, and the test revision of rp591 has loosened the radiographic acceptance criteria by one level. Then youll enjoy mss sp 55 pdf download for mac, with its nice features and accessibility.
Photographs are to be taken of the qualification casting in the asreceived condition to document surface finish and general appearance. Any visible leakage shall be cause for the casting to be unacceptable and call for corrective action. Images are used for comparison to cast surfaces in the mss sp55 method. Find the most uptodate version of mss sp 55 at engineering360. Mss sp 112 quality standard for evaluation of cast. Mss sp 55 quality standard for steel castings for valves, flanges. More than 2000 of these sets of comparators are used around the world by multinational companies and by small enterprises. Castings, surface acceptance standards, visual examination. End users and oems want additional guidelines, johnson said. Quality standard for steel castings for valves, flanges, fittings, and other.
Standard marking system for valves, fittings, flanges and unions. This standard practice provides methods and acceptance standards for. Visual method for evaluation of surface irregularities. Inspection and test plan reference document acceptance criteria verifying document 1. Quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface.
Its a good companion app to itunes, spotify and mss sp 55 pdf download and best of all, its free. Quality standard for steel castings for valves,flanges,fittings and other piping components. In this white paper, learn how you can configure freely without requiring any custom development, and quickly update configurations as your needs evolve. Complete document quality standard for steel castings for valves, flanges, fittings, and other piping components radiographic examination method. Theres a new 2011 edition of the mss sp 55, quality standard for steel castings for valves, flanges, fittings, and other piping components visual method for evaluation of surface irregularities. Mss, the manufacturers standardization society of the valve and fittings industry is a nonprofit standards developing organization that is devoted to the development of the industry.
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