HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (11 Oct 2025)

HG/T 20623-2009 PDF English

US$125.00 · In stock · Download in 9 seconds
HG/T 20623-2009: Large diameter steel pipe flanges (PN designated)
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid

HG/T 20623: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
HG/T 20623-2009English125 Add to Cart 0-9 seconds. Auto-delivery Large diameter steel pipe flanges (PN designated) Valid
HG 20623-1997EnglishRFQ ASK 9 days (Large-diameter steel pipe flanges (American System)) Obsolete

Excerpted PDFs (Download full copy in 9 seconds upon purchase)

PDF Preview: HG/T 20623-2009
      

Similar standards

GB/T 19326   GB/T 17241.6   HG/T 20614   

HG/T 20623-2009: Large diameter steel pipe flanges (PN designated)

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HGT20623-2009
Chemical Industry Standard of the People's Republic of China HG Replacing HG 20623-1997 Large Diameter 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 [Including Corrigendum/Modification confirmed in May 2012.Text in RED]

Table of Contents

1.General provisions... 3 2.Normative references... 3 3.Type and seal contact face of the flanges... 4 3.1 Flange type... 4 3.2 Seal contact face of the flanges... 5 4.Materials... 9 5.Maximum allowable working pressure... 9 6.Thickness of the straight flange... 10 7.Dimension... 10 8.Flange joint... 17 9.Welding joint and groove dimension... 18 10.Dimension tolerance... 19 11.Test... 20 12.Inspection and acceptance... 21 13.Markings and illustrations... 21 14.Packaging and steel seal labeling... 22 Appendix A (Informative) Approximate Mass of Larger Diameter Pipe Flanges... 23 Appendix B (Informative) Assorted Pipe Flanges' Standard... 25 1.General provisions 1.0.1 This national standard specifies nominal dimension, nominal pressure, material, pressure-temperature rating, flange type, dimension, seal contact face, tolerance and marking of larger diameter steel pipe flanges (Class designated). 1.0.2 This Standard is applicable to larger diameter weld neck steel pipe flanges and blind flanges with nominal pressure of Classl50 (PN20)~Class900 (PN150). The nominal pressure grade of the flange is denoted by Class, including the following four grades. Classl50, Class300, Class600 and Class900. 1.0.3 This Standard includes A and B two dimensions series of larger diameter steel pipe flange, and clear marking must be indicated when being adopted. 1.0.4 The applied nominal dimension DN and outside diameter of the steel pipe in this Standard are in accordance with those specified in Table 1.0.4. Table 1.0.4 Inside Nominal Diameter and Outside Diameter of the Steel Pipe Nominal dimension DN 650 700 750 800 850 900 950 1000 NPS 26 28 30 32 34 36 38 40 Outside diameter of the steel pipe (mm) 660 711 762 813 864 914 965 1016 Nominal dimension DN 1050 1100 1150 1200 1250 1300 1350 1400 1450 1500 NPS 42 44 46 484 50 52 54 56 58 60 Outside diameter of the steel pipe (mm) 1067 1118 1168 1219 1270 1321 1372 1422 1473 1524 1.0.5 This Standard is also applicable to valve, pump, chemical engineering machinery, pipeline fittings and equipment spares with flanges being used as type of attachment. 1.0.6 This Standard excludes selection principle for materials under particular fluid operating conditions. 2.Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, subsequent amendments (excluding content of corrigenda) to, or revisions of, any of these publications do not apply. However, Parties to agreements based on this Code are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies. "Fasteners-Counterbores for Hexagon Bolts and Nuts" GB/T 152.4 "Steel Pipe Flanges (Class Designated)" HG/T 20615 "Non-metallic Flat Gaskets for use with Steel Pipe Flanges (Class designated)" HG/T "PTFE Envelope Gaskets for use with Steel Pipe Flanges (Class designated)" HG/T "Metal Jacketed Gaskets for use with Steel Pipe Flanges (Class Designated)" HG/T "Spiral Wound Gaskets for use with Steel Pipe Flanges (Class Designated)" HG/T 20631 "Covered Serrated Metal Gaskets for use with Steel Pipe Flanges (Class Designated)" HG/T 20632 "Metallic Ring Joint Gaskets for use with Steel Pipe Flanges (Class Designated)" HG/T "Bolting for use with Steel Pipe Flanges (Class Designated)" HG/T 20634 "Specification for Selection of Steel Pipe Flanges, Gaskets and Bolting (Class designated)" HG/T 20635 "Carbon and Low-alloy Steel Forgings for Pressure Vessels" JB 4726 "Low-alloy Steel Forgings for Low Temperature Pressure Vessels" JB 4727 "Stainless Steel Forgings for Pressure Vessels" JB 4728 3.Type and seal contact face of the flanges 3.1 Flange type The flange type or its applied nominal dimension and nominal pressure are in accordance with those specified in Table 3.1. Table 3.2.7-3 Dimension of Ring Joint Face (mm) Nominal dimension Class300(PN50) Class600(PN110) Class900(PNl50) DN NPS Ring No. dmin P E F Rmax Ring No. dmin P E F Rmax 650 26 R93 810 749.30 12.70 19.84 1.5 R100 832 749.30 17.48 30.18 2.3 700 28 R94 861 800.10 12.70 19.84 1.5 R101 889 800.10 17.48 33.32 2.3 750 30 R95 917 857.25 12.70 19.84 1.5 R102 946 857.25 17.48 33.32 2.3 800 32 R96 984 914.40 14.27 23.01 1.5 R103 1003 914.40 17.48 33.32 2.3 850 34 R97 1035 965.20 14.27 23.01 1.5 R104 1067 965.20 20.62 36.53 2.3 900 36 R98 1092 1022.35 14.27 23.01 1.5 R105 1124 1022.35 20.62 36.53 2.3 4.Materials 4.0.1 The materials for steel pipe flanges comply with the requirements of Table 4.0.1 of HG/T 20615, whose chemical composition, mechanical property and other technical requirements shall be in accordance with the standards provisions listed in Table 4.0.1. 4.0.2 The grades and technical requirements of the forgings for use with pipe flanges (including forging rolling pieces) (refer to JB 4726, JB 4727 and JB 4728) shall be in accordance with the following requirements. 1 The one with one of the following qualifications shall comply with the requirements of III-level or above forgings; 1) Forgings with nominal pressure of more than or equal to Class600; 2) Chrome molybdenum steel forgings with nominal pressure of greater than or equal to Class300; 3) Ferrite steel forging with nominal pressure of greater than or equal to Class300 and with working temperature of less than or equal to -20℃. 2 Unless otherwise specified in Item 1 above, the forgings with nominal pressure of less than or equal to Class300 shall comply with the requirements of II-level or above forging, 4.0.3 The flanges (excluding blind flanges) shall be made of forgings (or forging rolling technology) or castings (steel), but shall not be tailor-welding. The blind flanges may be made of steel plate. 4.0.4 Unless otherwise specified in this Standard, the materials for pipe flange shall also comply with the requirements of relevant standards and codes. 5.Maximum allowable working pressure The maximum allowable working pressure of the flanges under working temperature complies with the requirements of Chapter 7 of HG/T 20615. Table 7.0.1-1 Class1500 (PN20) Larger Diameter Steel Pipe Flange and Blind Flange (A series) (mm) Nominal dimension Outside diameter A of the flange welding end Coupling dimension Thickness Inside diameter of the flange Flange neck Flange height H DN NPS Outside diameter of the flange Diameter of the bolt hole center circle Diameter of bolt hole Bolt Th Quantity of the bolt hole Flange Blind flange N R 650 26 660.4 870 806.4 36 M33 24 66.7 66.7 Conform to the inside diameter of the steel pipe 700 28 711.2 925 863.6 36 M33 28 69.9 69.9 727 11 124 750 30 762.0 985 914.4 36 M33 28 73.1 73.1 781 11 135 800 32 812.8 1060 977.9 42 M39 28 79.4 79.4 832 11 143 850 34 863.6 1110 1028.7 42 M39 32 81.0 81.0 883 13 148 900 36 914.4 1170 1085.8 42 M39 32 88.9 88.9 933 13 156 950 38 965.2 1240 1149.4 42 M39 32 85.8 85.8 991 13 156 1000 40 1016.0 1290 1200.2 42 M39 36 88.9 88.9 1041 13 162 1050 42 1066.8 1345 1257.3 42 M39 36 95.3 95.3 1092 13 170 1100 44 1117.6 1405 1314.4 42 M39 40 100.1 100.1 1143 13 176 1150 46 1168.4 1455 1365.2 42 M39 40 101.6 101.6 1197 13 184 1200 48 1219.2 1510 1422.4 42 M39 44 106.4 106.4 1248 13 191 1250 50 1270.0 1570 1479.6 48 M45 44 109.6 109.6 1302 13 202 1300 52 1320.8 1625 1536.7 48 M45 44 114.3 114.3 1353 13 208 1350 54 1371.6 1685 1593.8 48 M45 44 119.1 119.1 1403 13 214 1400 56 1422.4 1745 1651.0 48 M45 48 122.3 122.3 1457 13 227 1450 58 1473.2 1805 1708.2 48 M45 48 127.0 127.0 1508 13 233 1500 60 1524.0 1855 1759.0 48 M45 52 130.2 130.2 1559 13 238 Note. The inside diameter B of the flange is determined by the wall thi... ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

Tips & Frequently Asked Questions

Question 1: How long will the true-PDF of English version of HG/T 20623-2009 be delivered?

Answer: The full copy PDF of English version of HG/T 20623-2009 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.

Question 2: Can I share the purchased PDF of HG/T 20623-2009_English with my colleagues?

Answer: Yes. The purchased PDF of HG/T 20623-2009_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. www.ChineseStandard.us -- HG/T 20623-2009 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.

Question 5: Should I purchase the latest version HG/T 20623-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version HG/T 20623-2009 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

How to buy and download a true PDF of English version of HG/T 20623-2009?

A step-by-step guide to download PDF of HG/T 20623-2009_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "HG/T 20623-2009".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3    Steps 4~6    Step 7    Step 8    Step 9