~ ~ UDC 62.646.66-034 DEUTSCHE NORM October 989 Metal ball valves General requirements and methods of test DIN 3357 Part Kugelhähne; allgemeine Angaben für Kugelhähne aus metallischen Werkstoffen Supersedes August 982 edition. Field of application This standard provides general information regarding the presentation of standards dealing with general purpose metal ball valves. It specifies details to be included in the standard designation,and also requirements and methods of test for ball valves with regard to dimensions, valve pattern, trim, body materials and marking. 2 Nominal sizes and pressure ratings The nominal sizes shall be selected from DIN 2402 and the pressure ratings, from DIN 240 Part. 3 Designation The standard designation for ball valves as specified in the DIN 3357 series of standards shall take the following form: Ball valve DIN 3357 - X XXXX PN XXX - - XXX XXX - Term DIN number Hyphen Letter symbol denoting face-to-face or centre-to-face dlmension if different sizes are assigned to one pressure rating Nominal size Symbol denoting 'pressure rating' Nominal pressure Hyphen Code number (number of relevant Part of DIN 3357) Type symbol (the type symbol covers valve pattern, material and trim) 4 Dimensions 4. Face-to-face and centre-to-face dimensions The face-to-face or centre-to-face dimension shall be selected from DIN 3202 Part (flanged end ball valves),din 3202 Part 2 (weld end ball valves), DIN 3202 Part 3 (wafer type ball valves), DIN 3202 Part 4 (threaded end ball valves), or from DIN 3202 Part 5 (ball valves with compression ends). 4.2 Space requirement In DIN 3357 Parts 2 to 7,the space requirement dimensions are specified as the maximum dimensions of the enveloping body enclosing a ball valve with handwheel. In the case of ball valves which are not capable of being operated by a handwhee,the height required is the distance between bottom end of valve body and top end of stem. Continued on pages 2 to 7 th Verlag GmbH, Berlin, has the exclusive right of sale for German Standards [DIN-Nonnen). 09.90 DIN 3357 Pari Eng/. Price group -. Sales No. u07
~~~~~ Page 2 DIN 3357 Part 4.3 Vahreends Valve ends may be designed as a) flanged ends, with mating dimensions as specified in DIN 250 Part ; b) weld ends, with mating dimensions as specified in DIN 3239 Part ; c) threaded ends, with internal thread as specified in DIN 2999 Part ; d) threaded ends, with NPT internal thread as specified in ANSI B 2.; e) compression ends, as specified in DIN 2353; r) threaded ends, with internal and external thread as specified in IS0 228 Part ; g) ball type nipple screwed union, as specified in DIN 760. 5 mpes and trim 5. Body construction Table. One piece body Split body Sealed Axial entry Top entry With open bottom Single or multiple split Wafer type body (three piece) 5.2 Stem seal The stem seal shall be of the self-sealing type. 5.3 Seat seal The seat seal shall be of the self-sealing type. 5.4 Trim material The type of trim required foragiven ballvalve shall - B defined by specifying theca sgoryofthe stem,seat and boi-,'connec.>r seal.the maximum working pressure corresponding to the pressure rating can only be fully utilizedforthe temperature ranges associated with the particular seal category. Table 2. Seal category 2 3 4 Suitable materials (examples) - 0 to + 00 NBR*), CRZ), PA'), POM') - 0 to + 50 EPDMZ), FEPI) - 0to+200 FPM3) - 96 to + 200 PTFE'), PFA) I 5 I - 50 to + 400 It4), metal, graphite I ) As in DIN 7728 Part. 2) As in VDI 2537. 3) As in VDI 253. 4) As in DIN 3754 Part. I In the relevant product standards (DIN 3357 Parts 2 to 7), narrower limits may be specified for the temperature ranges given in table 2.
DIN 3357 Part Page 3 Table 3. Pressure temperature ratings for seal category 4 ball valves The maximum working pressures specified in table 3 are minimum values and shall apply for seal materials without filler (Le. asbestos-free materials), intermediate values being obtained by linear interpolation.the maximum working pressure for temperatures from - 96 C to -30 C are not to be specified before the manufacturer has been consulted. 5.5 Handwheel Unless otherwise specified in DIN 33s Parts 2 to 7, ball valves shall be supplied with a handwheel. 6 Body materials The materials listed in table 4 are materials of the pressure containing parts of the body, the choice of body material from among the materials belonging to a particular material group being up to the manufacturer.the body port ends may also be made of materials as specified in DIN 629, DIN 630, DIN 772 and 775. Table 4. Material group Lamellar graphite cast iron Material number 0.6020 0.6025 Material designation GG-20 GG-25 DIN 69 DIN 69 Specified in Nodular graphite cast iron 0.7040 0.7043 0.7050 GGG-40 GGG-40.3 GGG-50 DIN 693 Part DIN 693Part DIN 693 Part Unalloyed and low alloy steel.o037.o254.o050 -.O460.O50.069.O40.O403.O402.O404.O50 St 37-2 St 37 St 50-2 C 22.3 C 22.8 c 35 GS-C 25 C 5 C 5Pb c 22 C 22 Pb c 35 DIN 700 DIN 629 DIN 700 VdTÜV Material sheet 364 5) VdTÜV Material sheet 350 5) DIN 652 DIN 7245 DIN 720 Not specified. DIN 7200 Not specified. DIN 7200 3ee cutting steel.o7 5.078 9 SMn 28 9 SMnPb 28 DIN 65 DIN 65 Stainless steel.4000.4027.430.4308.43 O.440.4404.4406.4408.440.454.457.458 X7Cr3 G-X 20 Cr 4 X 5 CrNi 89 G-X 6 CrNi 89 X 2 CrNi 77 X 5 CrNiMo 80 X 2 CrNiMo 80 X 2 CrNiMoN 8 2 G-X 6 CrNiMo 8 0 G-X 0 CtNiMo 89 X 0 CrNiTi 89 X 0 CrNiMoTi 80 G-X 7 CrNiMoNb 80 i) Obtainable from: Maxirnilian Verlag, Postfach 3 7, D-4900 Herford.
~ ~~ Page 4 DIN 3357 Part Table 4 (concluded). Material group Material number Material designation Specified in Steel with low temperature toughness.o356.729.6902.56 TTSt 35 GS-26 CrMo 4 G-X 6 CrNi 80 GS-Ck 24 SEW 680 6, SEW 6856) SEW 6856) SEW 6856) Fine grain structural steel.o508.o566.o565 TStE 35 TStE 355 WStE 36 SEW 0896) SEW 0896) SEW 089 6) Copper alloys 2.0380 2.040 2.0360 2.020 2. 030 2.050.0 2.096.0 2.0340.02 2.086.0 CuZn39Pb2 CuZn39Pb3 CuZn40*) CuSn6 CuSn8 G-CuSn 0 G-CuSn5ZnPb GK-CuZn37Pb G-CuSnl OZn DIN 7 660 DIN 7660 DIN 7 660 DIN 7662 DIN 7662 DIN 705 DIN 705 DIN 709 DIN 705 Aluminium alloys ~ 3.2 5.O 3.234.O 3.234.O2 3.2383.0 3.2383.02 3.2382.05 3.258.O 3.324.0 3.235.7 3.3206 3.3535 G-ALS~GCU~ G-AISi5Mg GK-AISi5Mg G-AlSi OMg(Cü) GK-AlSi OMg(Cü) GD-AlSi OMg G-AISi2 G-AIMg3Si AlMgSi F28 AlMgSi0,5 AiMg3 DIN 725 Part2 DIN 747 Part DIN 725 Part DIN 725 Part ') Note. This symbol, as used in the standard designations given in DIN 3357 Parts 4 and 5, represents a group of alloys. 3) Obtainable from Verlag Stahleisen mbh, Postfach 82 29, D-4000 Düsseldorf.
~ ~~ ~~ 7 Requirements and testing DIN 3357 Part Page 5 Ball valves shall meet the requirements given in tables 5 and 6. Compliance with the requirements listed in table 5 shall be checked by the manufacturer for every valve,compliance with those listed in table 6, by in-process testing on the basis of random sampling. Table 5. Ser. No. 2 3 4 5 6 7 8 9 Requirement Compliance with the purchase order data ~~~ Type, pattern and trim material On delivery, valves shall be in their as ordered condition. Marking The marking on the valves shall comply with the standard and be legible. Surfaces The surfaces shall exhibit no defects likely to impair safety or proper functioning of the valve. Protective coatings The parts that require protection shall be provided with a protective coating. Actuation The valve shall be capable of being actuated properly on delivery. In the as installed position of the valve, the stem positions shall be clearly identifiable. Strength of valve body In the strength test, the body shall show no signs of deformation for the specified test duration. Tightness of body and stem seal In the tightness test, the body connector seal shall be tight for the specified duration of test. Leakage rate shall apply to the tightness of the stem seal. Seat tightness Seat leakage rate shall apply for seal categories to 4, and leakage rate 2 for seal category 5 valves when subjected to the nominal pressure or the maximum differential pressure. If the production cycle time is shorter than the test juration specified in DIN 3230 Part 3, the test duration for all valves shall be equal to the cycle time, ran- Jom samples being taken and tested to test level 3 'or the test duration specified in DIN 3230 Part 3. Testing as in DIN 3230 - AA DIN 3230 - AB DIN 3230 - AC DIN 3230 - AE DIN 3230 - AP DIN 3230 - AG DIN 3230 - BA, the test duration being equal to - DN s, with a minimum of 0s. 0 In the case of PN 4 valves, the strength test may be carried out together with the tightness test, using air. DIN 3230 - BO, the test duration being equal to - DN s, with a minimum of 0s. 0 DIN 3230 - BN or BO
Page 6 DIN 3357 Part Table 6. Ser. No. Requirement Testing as in 2 Dimensions The dimensions as specified in the dimensional standards shall lie within the permissible tolerances. Condition of end faces The surface condition of the end faces shall comply with the specifications of the relevant flange standard. DIN 3230 -AD, test level 2 DIN 3230 -AF, test level 2 Additional requirements and methods of test which are specified in the relevant technical rules (e.g. DIN 3230 Parts 4 to 6, TRD 3, AD-Mefkblgtter (AD Instruction sheets) 7)) shall be agreed at the time of ordering. 9 Marking Marking of valves shall be as specified in EN 9. Standards referred to and other documents DIN 629 DIN 630 DIN 65 DIN 652 DIN 69 DIN 693 Part DIN 705 DIN 709 DIN 725 Part DIN 725 Part2 DIN 747 Part DIN 2353 DIN 240 Part DIN 2402 DIN 250 Part i DIN 2999 Part DIN 3202 Part DIN 3202 Part2 DIN 3202 Part 3 DIN 3202 Part 4 DIN 3202 Part5 DIN 3230Part3 DIN 3230 Part4 DIN 3230 Part5 DIN 3230Part6 DIN 3239 Part DIN 3357 Part 2 DIN 3357 Part 3 DIN 3357 Part4 DIN 3357 Part5 DIN 3357Part6 DIN 3357Part7 DIN 3754 Part Seamless circular unalloyed steel tubes subject to special requirements; technical delivery conditions High performance seamless circular unalloyed steel tubes; technical delivery conditions Free cutting steels; technical delivery conditions Bright unalloyed steel; technical delivery conditions Cast iron with lamellar graphite (grey cast iron); properties Cast iron with nodular graphite; unalloyed and low alloy grades Copper-tin and copper-tin-zinc casting alloys; castings Copper-zinc casting alloys; castings Aluminium wrought alloys Aluminium casting alloys; sand casting, gravity die casting, pressure die casting, investment casting Wrought aluminium and aluminium alloy rod and bar; properties Solderless compression fittings; screwed union assemblies Components subject to internal or external pressure; pressure and temperature specifications; concepts and pressure ratings Pipelines; nominal sizes, concept and grading Flanges; mating dimensions Pipe threads for tubes and fittings: parallel internal thread and taper external thread; dimensions Face-to-face and centre-to-face dimensions; flanged valves End-to-face and centre-to-end dimensions; weld end valves Face-to-face dimensions; wafer type valves Face-to-face and centre-to-face dimensions; valves with female thread connection Face-to-face and centre-to-face dimensions; valves with compression ends Technical delivery conditions for valves, summary of test methods Technical delivery conditions for valves; drinking water valves; requirements and testing Technical delivery conditions for valves; valves for gas applications; requirements and testing Technical delivery conditions for valves; valves for combustible liquids; requirements and testing Valve welding ends Ball valves; full bore steel ball valves Ball valves; reduced bore steel ball valves Ball valves; full bore non-ferrous metal ball valves Ball valves; reduced bore non-ferrous metal ball valves Ball valves; full bore cast iron ball valves Ball valves; reduced bore cast iron ball valves Gasket materials; compressed asbestos fibre sheets; dimensions, requirements and testing 7) Obtainable from Beuih Verlag GmbH, BurggrafenstraBe 6, D-000 Berlin 30 and Carl Heymanns Verlag KG, Luxemburger Stra6e 449, D-5000 Köln. *
DIN 760 DIN 7728Part DIN 700 DIN 772 DIN 775 DIN 7200 DIN 720 DIN 7245 DIN 7660 DIN 7662 IS0 228 Part EN 9 VDI 253 VDI 2537 VdT hl-werkstoffblatt steel) Ball type nipple screwed pipe unions; screwed pipe union assemblies Plastics; symbols for homopolymers, copolymers and polymer mixtures Steels for general structural purposes; quality standard DIN 3357 Part Page 7 Steel pipes for long-distance pipelines for combustible liquids and gases; technical delivery conditions Seamless tubes of heat-resistant steels; technical delivery conditions Steels for quenching and tempering; technical delivery conditions Case hardening steels; technical delivery conditions Ferritic steel castings with elevated temperature properties; technical delivery conditions Stainless steels; technical delivery conditions for plate and sheet, hot rolled strip, wire rod, drawn wire, steels bars, forgings and semi-finished products Stainless steel castings; technical delivery conditions Wrought copper alloys: copper-zinc alloys; composition Wrought copper alloys; copper-tin alloys; composition Pipe threads where pressure-tight joints are not made on the threads; designation,dimensions and tolerances Marking of general purpose industrial valves Oberflächenschutz durch Beschichtungen und Auskleidungen mit organischen Werkstoffen; Wahl der Unerkstoffe und Verfahren (Surface protection using organic materials; selection of coating materials and processes) Oberflächenschutz mit organischen Werkstoffen; Oberf/ächenschutz mit Bahnen auf Basis von Natur- und Synthesekautschuk (Surface protection using organic materials; surface protection with rubber and elastomer sheeting) (VdTÜV Material sheet) 350 5) Unlegierter Walz- und Schmiedestahl (Unalloyed rolled steel and forged VdTÜV-Werkstoffblatt 364 5) Flansche aus uniegiertem Stahl (Unalloyed steel flanges) Stahl- isen-werkstot/azt (Iron and steel materials sheet) 0896) SchweiBbare Feinkornbaust#h/e; Gütevorschriften (Weldable fine-grain structural steels: quality specifications) Stahl-Eisen-Werkstoffblait 6806) Kakzähe Stähle; Gütevorschriften (Steel with low temperature toughness, quality specifications) Stahl-Eisen-Werkstoffbla~ 6856) Kaltzäher StahlguB; Gütevorschriften (Steel casting with low temperature toughness, quality specifications) ANSI B 2. 8) Pipe threads (except dry seal) Previous editions DIN 3357 Part : 2.8, 08.82. Amendments In comparison with the August 982 edition, the temperature range for seal category 4 specified in table 2 has been amended to - 96 C to + 200 C (instead of 230 C). International Patent Classification F 6 K 5/06 For 9, see page 3. For 6). see page 4. 8) Obtainable from Beuth Verlag GmbH (Auslandsnormenvermittlung), BurggrafenstraBe 6,D-000 Berlin 30.