HG/T 20612-2009 PDF English
US$75.00 · In stock · Download in 9 secondsHG/T 20612-2009: Metallic ring joint gaskets for use with 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 procedureStatus: Valid HG/T 20612: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| HG/T 20612-2009 | English | 75 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Metallic ring joint gaskets for use with steel pipe flanges (PN designated)
| Valid |
| HG 20612-1997 | English | RFQ |
ASK
|
9 days
|
(Steel pipe flanges with metal ring gasket (European system))
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: HG/T 20612-2009
HG/T 20612-2009: Metallic ring joint gaskets for use with 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/HGT20612-2009
Chemical Industry Standard
of the People's Republic of China
HG
Replacing HG 20612-1997
Metallic Ring Joint Gaskets for use with Steel Pipe
Flanges
(PN designated)
(PN 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. Scope ... 3
2. Normative References ... 3
3. General Provisions ... 3
4. Dimension ... 5
5. Technical Requirements ... 6
6. Inspection ... 8
7. Labeling... 8
1. Scope
This standard specifies the type, dimension, technical requirements, labeling and
marking of metallic ring joint gaskets for steel pipe flanges (PN designated).
This standard is applicable to metallic ring joint gaskets for steel pipe flanges specified in
HG/T 20592 whose nominal pressure is PN63~PN160.
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.
“Permissible Tolerances for Chemical Composition of Steel Products" GB/T 222
“Quality Carbon Structural Steels" GB/T 699
“Stainless Steel Bars" GB/T 1220
“Roughness Comparison Specimens-Ground, Turned, Bored, Milled, Shaped and
Planed" GB/T 6060.2
“Technical Requirements for Magnetic Iron Bars" GB/T 6983
“Stee1 Pipe F1anges (PN designated)" HG/T 20592
“Specification for Selection of Steel Pipe Flanges, Gaskets and Bolting (PN designated)"
HG/T 20614
“Carbon and Low-alloy Steel Forgings for Pressure Vessels" JB 4726
“Stainless Steel Forgings for Pressure Vessels" JB 4728
3. General Provisions
3.0.1 Type
According to the section forms, the ring joint flanges for metallic ring joint gaskets can
be divided into the following two types. elliptic type and octagonal type, see Figure 3.0.1.
Table 5.0.2 Dimension tolerance of Metallic Ring Joint Gaskets (mm)
Item Dimension tolerance Item Dimension tolerance
P ±0.18 C ±0.20
A ±0.20 r ±0.5
B or H ±0.50 23o ±0.50
5.0.3 Manufacture
1 Generally, the metallic ring joint gaskets are manufactured integrally with steel bars,
seamless steel tubes and forgings, and if other blank is to be adopted, approval shall be got
from users.
2 Pony-dimension ring joint gaskets can be manufactured directly with steel bars and
seamless steel tube through mechanical processing, while for the larger-dimension air rings,
they shall be made through thermally treating and mechanically processing forgings.
3 As for the metallic ring joint gaskets which are made up of readily-rusting materials
(pure iron, Grade 10 steel, 1Cr5Mo), their surface shall be coated with antirust after
inspection. Anti-corrosive treatment shall be carried out for stainless steel ring joint gaskets
according to users' requirements.
5.0.4 Inspection
1 Appearance and dimension inspection
The appearance of ring joint gaskets shall be inspected visually before leaving the factory.
Its surface roughness may be compared with that of the standard sample block with visual
method (GB/T 6060.2). While for its pitch diameter, ring width, ring height, octagonal gasket
angle and flat width, they shall be inspected with special measuring device in accordance with
the provisions of Table 5.0.2 of this standard.
2 Material inspection
The chemical composition of metallic ring joint gaskets shall meet the provisions of
Table 3.0.3 of this standard and those of the relevant standards. The allowable deviation
between the values from product analysis and specified values of the standard shall meet the
provisions of GB/T 222.
3 Hardness inspections.
1) The blank hardness shall be inspected randomly with the Brinell hardness method
and also meet the provisions of Table 3.0.3 of this standard.
2) The hardness of the product shall be inspected randomly with the Rockwell
Hardness method. Inspect two sections symmetrically below R23 and four sections
above R24; their average value shall meet the provisions of Table 3.0.3 of this standard.
5.0.5 Performance test and method
The performance test and method of metallic ring joint gaskets shall meet the relevant
provisions specified by users.
6. Inspection
6.0.1 The material, dimension, appearance and hardness of gaskets shall be compliant to the
provisions of this standard.
6.0.2 Other inspection requirements may be determined through negotiating with the
producers at ordering.
7. Labeling
7.0.1 Labeling and illustration
1 The gasket shall be labeled according to the following provisions.
1) Standard name;
2) Gasket type;
3) Nominal dimension (DN);
4) Nominal pressure (PN);
5) Material marking (according to the provisions of Table 3.0.3 of this standard).
2 Illustration.
As for the metallic ring joint gaskets (elliptic type) for steel pipe flanges whose nominal
dimension is DN100, nominal pressure is PN63, the used material is 0Cr18Ni9, it can be
marked as.
HG/T 20612 Elliptic gasket 100-63 304
7.0.2 Marking
A permanent marking (e.g.. steel seal) shall be made on the lateral surface of the metallic
ring joint gaskets. The marking contents are as follows.
1 Name or trademark of the producer;
2 Standard No.;
3 Nominal dimension (DN);
4 Nominal pressure (PN);
5 Material marking (according to the provisions of Table 3.0.3 of this standard)
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of HG/T 20612-2009 be delivered?Answer: The full copy PDF of English version of HG/T 20612-2009 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 20612-2009_English with my colleagues?Answer: Yes. The purchased PDF of HG/T 20612-2009_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+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- HG/T 20612-2009 -- 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 20612-2009?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version HG/T 20612-2009 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 20612-2009?A step-by-step guide to download PDF of HG/T 20612-2009_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 20612-2009".
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
|