HPP-74+EN+C

DRAWING INTERPRETATION1. SCOPE:This standard defines uniform interpretation practices for product drawings and establishes practical limits for the manufacturing control of part features and geometric characteristics.2. APPLICATION:2.1 The requirements of this standard apply to product drawings under control of all plants of the PropelDivision of Sauer-Danfoss Company. This standard has multi-language versions; their content isidentical.2.2 Drawings invoking the use of this standard shall contain the following notes:DRAWING INTERPRETATION PER HPP 74.TOLERANCING ISO 8015.ENVELOPE PRINCIPLE INVOKED BY E PLACED AFTER THE LINEAR TOLERANCE.2.3 The order of precedence regarding this standard, the drawing, and the specifications referenced on thedrawing is as follows in the event of conflict:a. The body of the drawing (this cannot be modified by b, c, or d).b. Specifications referenced on the drawing, excluding this standard (this cannot be modified by cor d).c. This standard (this cannot be modified by d).d. Specifications referenced in this standard.3. RELATED DOCUMENTS:The following standards are referenced and form a part of this standard to the extent specified herein. As interpretation may change between different issues, only the date specified issue must be used.ASME B1.1-2003 Unified Inch Screw Threads (UN and UNR Thread forms)ASME Y14.5M-1994 Dimensioning and TolerancingDIN 13 ISO Metric Screw ThreadsDIN 6773:2001 Heat Treated Parts, Representation and Indication in DrawingsISO 1101:2004 Technical drawings-Geometrical tolerancingISO 1302:1992 Technical drawings-Method of indicating surface textureISO 1660:1987 Technical drawings-Dimensioning and tolerancing of profilesISO 2553:1992 Welded, brazed and soldered joints - Symbolic representation on drawingsISO 4287:1997 Surface texture: Profile method –Terms, definitions and surface textureparametersISO 4288:1996 Surface texture: Profile method – Rules and procedures for the assessmentof surface textureISO 8015:1985 Technical drawings - Fundamental tolerancing principleISO 6149-1:2006 Ports and stud ends with ISO 261 metric threads and O-ring sealing – Part 1:Ports with truncated housing for O-ring sealISO 11926-1:1995 Ports and stud ends with ISO 725 threads and O-ring sealing – Ports with O-ring seal in truncated housingISO 6162:2002 Flange connectors with split or one-piece flange clamps and metric or inchscrewsISO 1219-1:1991 Fluid power systems and components-Graphic symbols and circuits.Part 1: Graphic symbolsISO 1219-2:1995 Fluid power systems and components-Graphic symbols and circuits.Part 2: Circuits diagramsISO 965-1:1998 ISO general purpose metric screw threads –Tolerances –Part 1:Principles and basic dataISO 13715:2000 Technical Drawings –Edges of undefined shape –Vocabulary andindications4. GENERAL REQUIREMENTS:4.1 All revisions to this standard must be authorized by an engineering change. The approval must begiven in all languages in which the specification exists. All changes must have identical content.The approval of the English version must be authorized by SD/AMS and the German version bySD/NMS, all other versions by the Engineering Department responsible for that language.4.2 All linear dimensions are in millimeters, unless otherwise specified.4.3 Dimensions specified on drawings are finish size dimensions and define the final configuration.4.3.1 All finish size dimensions must be met after all processing. Processing includes allmanufacturing operations such as machining, heat treatment, plating, polishing, etc.4.3.2 All dimensions are to be met when parts or assemblies are free from restraining forces (in freestate), unless otherwise specified.4.4 All limits are absolute. Dimensional limits, regardless of the number of decimal places, are used as if theywere continued with zeros.EXAMPLES:12.2 means 12.20 012.0 means 12.00 012.01 means 12.010 04.5 Single limits are used where the intent will be clear, and the unspecified limit can be zero or approachinfinity and will not result in a condition detrimental to the design.EXAMPLES:1.0 MAX means .00 low limit/1.0 high limit0.5 MIN means 0.5 low limit/infinity as high limit4.6 Surfaces or centerlines shown on drawings at right angles to each other are implied to be 90°on thedrawing.4.7 Undefined angles in holes shall be interpreted to be produced by a drill point with an included angle that isoptimum for making that hole. Typically 118° ± 6° is used.5. DETAIL REQUIREMENTS:5.1 Screw Threads:5.1.1 Unified inch straight screw threads shall be in accordance with ASME B1.1-2003.5.1.2 Metric straight screw threads shall be in accordance with DIN 13.5.2 Straight Thread O Ring Boss:Straight thread o ring ports for connection to hydraulic fittings shall be in accordance with the following:5.2.1 Ports with metric threads shall be in accordance with ISO 6149-1:2006. SAE J2244/1 istechnically equivalent to ISO 6149-1 and may also be used.5.2.2 Ports with inch threads shall be in accordance with ISO 11926-1:1995. SAE J1926/1 istechnically equivalent to ISO 11926-1 and may also be used.5.3 Surface Texture:5.3.1 Surface texture symbols on Engineering drawings shall be interpreted per ISO 1302:1992.Unless otherwise indicated, surface roughness shall be interpreted as Ra.5.3.2 Where no surface texture control is specified on the drawing, the surface produced by normalmanufacturing methods shall be satisfactory provided it is within the limits of size and form.5.3.3 In transitional areas, such as chamfers and fillets, the roughest microfinish of the adjacentsurfaces shall apply, unless otherwise specified.5.3.4 Surface texture shall be measured in accordance with ISO 4287:1997 and ISO 4288:1996.5.4 Welding:Welding symbols on engineering drawings shall be interpreted per ISO 2553:1992.5.5 Edge and Fillet Quality:5.5.1 All edge and fillet quality shall be in accordance with ISO 13715:2000.5.5.2 Unless otherwise specified, edge and fillet quality shall be in accordance with the following:Edge Quality Fillet QualityThe actual edge or fillet may be a chamfer or a radius, or any other kind of configuration withinthe specified limits. This means:Edge Quality at MMC Fillet Quality at MMCMMC = MAX MATERIAL CONDITIONi.e. lower limit of edge or upper limit of fillet.Edge Quality at LMC Fillet Quality at LMCLMC = LEAST MATERIAL CONDITIONi.e. upper limit of edge- or lower limit of fillet.5.6 Geometrical Tolerancing:5.6.1 Geometric symbols and tolerances as used on engineering drawings shall be interpreted perISO 1101:2004 and the application of the least material condition (LMC) as defined by ASMEY14.5M-1994.5.6.2 The “principle of independency”, defined by ISO 8015:1985, is to be used when interpretingengineering drawings, unless otherwise specified by the envelope requirement or the maximummaterial principle. The envelope requirement is identified by the bold symbol of the letter E ina circle.5.7 Heat Treatment:Representation and indications of heat treatment requirements shall be interpreted per DIN 6773:2001.。