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HG/T 20634-2009 PDF in English


HG/T 20634-2009 (HG/T20634-2009, HGT 20634-2009, HGT20634-2009)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
HG/T 20634-2009English115 Add to Cart 0-9 seconds. Auto-delivery. Bolting for use with steel pipe flanges (Class designated) Valid
HG 20634-1997EnglishRFQ ASK 9 days (Steel pipe flanges with fasteners (American System)) Obsolete
Standards related to (historical): HG/T 20634-2009

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HG/T 20634-2009: PDF in English (HGT 20634-2009)

HG/T 20634-2009 Chemical Industry Standard of the People's Republic of China HG Replacing HG 20632-1997 Bolting for use with steel pipe flanges (Class designated) (Class系列) ISSUED ON. FEBRUARY 5, 2009 IMPLEMENTED ON. JULY 1, 2009 Issued by. Ministry of Industry and Information Technology of the People's Republic of China Contents 1. Scope ... 3  2. Normative references ... 3  3. Types, specification and dimension of bolting ... 4  3.1 Bolting type ... 4  3.2 Hexagon head bolts ... 4  3.3 Full thread bolts ... 4  3.4 Screw nuts ... 5  4. Materials... 7  5. Usage of bolting ... 8  6. Dimension tolerance ... 24  7. Surface treatment ... 24  8. Inspection ... 24  9. Acceptance, packaging and quality certificate ... 24  10. Labeling and marking ... 25  Appendix A (Informative Appendix) Plain Washers for Pipe Flange Bolting ... 26  Appendix B (Informative Appendix) Bolting and Insulated Members for Insulated Flanges ... 28  1. Scope This standard specifies the type, dimension, material, labeling, technical requirements and application of bolting for steel pipe flanges (C1ass designated). This standard is applicable to the bolting for steel pipe flanges (including. hexagon head bolt, full thread bolt and screw nut) specified in HG/T 20615, HG/T 20623. 2. Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not apply. However, parties to agreement based on this standard are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this national standard. "Fasteners-Ends of Parts with External Thread" GB/T 2 "Fasteners--Acceptance Inspection" GB/T 90.1 "Fasteners--Marking and Packaging” GB/T 90.2 "General Purpose Metric Screw Threads—Basic Dimensions " GB/T 196 "General Purpose Metric Screw Threads—Tolerance" GB/T 197 "Double End Studs (clamping type)-Product Grade B” GB/T 901 "Stainless Steel Bars" GB/T 1220 "Alloy Constructional Steel" GB/T 3077 "Mechanical Properties of Fasteners-Bolts, Screws and Studs" GB/T 3098.1 "Mechanical Properties of Fasteners—Nuts—Coarse Thread" GB/T 3098.2 "Mechanical Properties of Fasteners-Stainless Steel Bolts, Screws and Studs" GB/T 3098.6 "Mechanical Properties of Fasteners—Stainless Steel Screw Nuts” GB/T 3098.15 "Tolerances for Fasteners-Bolts, Screws, Studs and Screw Nuts” GB/T 3103.1 "Laminated Rods" GB/T 5133—1985 "Hexagon Head Bolt" GB/T 5782 "I-type Hexagon Nuts” GB/T 6170 "Fasteners-Surface Discontinuities-Bolts, Screws and Studs for General Requirements" GB/T 5779.1 "Fasteners-Surface Discontinuities-Nuts" GB/T 5779.2 "Fasteners-Surface Discontinuities-Bolts, Screws and Studs for Special Requirement" GB/T 5779.3 "Steel Pipe Flanges (C1ass designated)" HG/T 20615 "Large-diameter Steel Pipe Flanges (C1ass designated)" HG/T 20623 "Specification for Selection of Steel Pipe Flanges, Gaskets and Bolting (C1ass 4.0.4 Continued Grade Chemical composition (Standard number) Heat treatment system Specification Mechanical property HB бb бa δ5(%)≥ (MPa)≥ 0Cr18Ni9 GB/T 1220 Solid solution — 515 205 40 ≤187 0Cr17Ni12M02 GB/T 1220 Solid solution — 515 205 40 ≤187 A193, B8-2 ASTM A193 Solid solution + strain hardening ≤M20 860 690 12 ≤321 >M20~M24 795 550 15 >M24~M30 725 450 20 >M30~M36 690 345 28 A193, B8M-2 ASTM A193 Solid solution + strain hardening ≤M20 760 665 15 >M20~M24 690 550 20 ≤321 >M24~M30 655 450 25 >M30~M36 620 345 30 A320, L7b ASTM A320 Slack quenching (tempering≥620℃) ≤M65 860690725550 1618 -≤235 A453, 660 ASTM A453 Solid solution + strain hardening — 895 585 15 ≥99 a Low temperature notch impact test shall be carried out for 35CrM0 which is used at lower than - 20℃, and the average value of its three impact energy Akv shall not be lower than 27J, which shall be indicated at ordering. b When it is used at above -100℃, the minimum impact energy of the low-temperature impact test shall be 27J. 4.0.5 The mechanical property test shall be carried out for the roughcast of full thread bolt batch by batch. The hardness test shall be carried out for the roughcast of special screw nuts batch by batch. 5. Usage of bolting 5.0.1 The usage of commercial grade hexagon head bolts and I type hexagon nuts shall be in accordance with the following requirements. 1 Nominal pressure grade is less than or equal to Class150. 2 Be used in non-toxic, non-combustible medium as well as non-severe cyclic occasions; 3 Be matched with nonmetallic flat gaskets. 5.0.2 In addition to Article 5.0.1, special-grade full thread bolts and special screw nuts shall be selected. 5.0.3 The working pressure and temperature range of bolting shall meet the provisions of Table 5.0.3 of this standard. Table 5.0.4 Match of Hexagon Head Bolt and Screw Nuts Hexagon head bolts, studs Nuts Type (Standard number) Performance rate or material trademark Type and production grade (Standard number) Performance rate or material trademark Hexagon head bolt GB/T 5782 Grade A and Grade B 5.6 8.8 I type hexagon nut GB/T 6170, Grade A and Grade B A2-50 A4-50 A2-50 A4-50 A2-70 A4-70 A2-70 A4-70 Full thread bolt HG/T 20634 35CrM0 Screw nuts for pipe flanges HG/T 20634 35CrM0 25Cr2M0V 30CrM0 42CrM0 0Cr18Ni9 0Cr18Ni9 0Cr17Ni12M02 0Cr17Ni12M02 A193, B8 C1.2 A194, 8A194, 8M A193, B8M C1.2 A453, 660 A320, L7 A194, 7 5.0.5 The selection of bolting, flanges and gaskets shall meet the provisions of HG/T 20635. 5.0.6 The length and mass of hexagon head bolts or studs are given in Table 5.0.6-1~Table 5.0.6-18. Users may also choose other bolt length so as to satisfy the connection requirements. The bolting length in the table excludes the thickness of cushion ring. 5.0.7 The length of hexagon head bolts or studs for butt welding ring loose flanges shall be determined according to the following formula. Hexagon head bolt or stud length=length of bolt for corresponding raised face flange-2×raised face height+2×butt welding ring thickness Note. The thickness of butt welding ring shall be determined according to the requirements of users at ordering; generally, it is equal to the wall thickness of matched steel tube. 5.0.8 The mass of screw nuts shall be as shown in Table 5.0.8. 5.0.9 The usage of cushion ring may be in accordance with the provisions of Appendix A of this standard. 5.0.10 The bolting for insulated flanges shall be selected according to the provisions of Appendix B of this standard. Table 5.0 6-1 Length Code Name of Hexagon Head Bolts or Studs for Flange Joints with the Same Pressure Rating Code name Raised face Female face/male face, tongue Ring joint face Length code name of hexagon head LSR — — Length code name of studs LZR LZM LZJ 5.0.6-3 continued Nominal size Screw thread Quantity n(Pcs) Hexagon head bolt DN NPS LSR(mm) Mass(kg) 1150 46 M39 40 265 3164 1200 48 M39 44 275 4277 1250 50 M45 44 290 4463 1300 52 M45 44 300 4587 1350 54 M45 44 310 4711 1400 56 M45 48 315 4773 1450 58 M45 48 325 4897 1500 60 M45 52 330 4959 Note. 1 The length of bolting is excluded in the thickness of cushion ring. 2 The mass of bolting is the approximate mass of per 1000 pieces. Table 5.0.6-4 Length and Mass of Hexagon Head Bolts for B-series Flanges of Class150 (PN20), DN>600mm Nominal size Screw thread Quantity n(Pcs) Hexagon head bolt DN NPS LSR(mm) Mass(kg) 650 26 M20 36 115 366 700 28 M20 40 125 300 750 30 M20 44 125 300 800 32 M20 48 125 390 850 34 M24 40 135 644 900 36 M24 44 145 894 950 38 M27 40 150 917 1000 40 M27 44 155 940 1050 42 M27 48 160 963 1100 44 M27 52 165 1219 1150 46 M30 40 170 1247 1200 48 M30 44 175 1275 1250 50 M30 48 185 1331 1300 52 M30 52 185 1331 1350 54 M30 56 190 1359 1400 56 M30 60 195 1728 1450 58 M33 48 200 1762 1500 60 M33 52 205 1796 Note. 1 The length of bolting is excluded in the thickness of cushion ring. 2 The mass of bolting is the approximate mass of per 1000 pieces. Table 5.0.6-5 Length and Mass of Studs for Flanges of Class150 (PN20), DN≤600mm Nominal size Screw thread Quan... ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.