|
US$679.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 17241.2-2024: Cast iron pipe flanges - Part 2: Class designated
Status: Valid GB/T 17241.2: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 17241.2-2024 | English | 679 |
Add to Cart
|
5 days [Need to translate]
|
Cast iron pipe flanges - Part 2: Class designated
| Valid |
GB/T 17241.2-2024
|
| GB/T 17241.2-1998 | English | 439 |
Add to Cart
|
3 days [Need to translate]
|
Cast iron pipe blank flanges
| Obsolete |
GB/T 17241.2-1998
|
PDF similar to GB/T 17241.2-2024
Basic data | Standard ID | GB/T 17241.2-2024 (GB/T17241.2-2024) | | Description (Translated English) | Cast iron pipe flanges - Part 2: Class designated | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J15 | | Classification of International Standard | 23.040.60 | | Word Count Estimation | 34,399 | | Date of Issue | 2024-04-25 | | Date of Implementation | 2024-11-01 | | Older Standard (superseded by this standard) | GB/T 17241.1-1998; GB/T 17241.2-1998; GB/T 17241.3-1998; GB/T 17241.4-1998; GB/T 17241.5-1998; GB/T 17241.6-2008; GB/T 17241.7-1998; GB/T 17241.1-1998; GB/T 17241.2-1998; GB/T 17241.3-1998; GB/T 17241.4-1998; GB/T 17241.5-1998; GB/T 17241.6-2008; GB/T 17241.7-199 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 17241.2-2024: Cast iron pipe flanges - Part 2: Class designated---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 23:040:60
CCSJ15
National Standards of People's Republic of China
Partially replaces GB/T 17241:1-1998~GB/T 17241:5-1998, GB/T 17241:6-2008, GB/T 17241:7-1998
Cast iron pipe flanges Part 2: Class series
Released on 2024-04-25
2024-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Types and parameters 1
4:1 Nominal pressure 1
4:2 Nominal size 1
4:3 Sealing surface type and code 2
4:4 Flange type, code and applicable scope 2
5 Type and size 3
5:1 Types and dimensions of integral cast iron pipe flanges 3
5:2 Types and sizes of cast iron pipe flanges with neck threads 8
5:3 Types and sizes of plate-type loose-fitting cast iron pipe flanges 12
5:4 Types and sizes of cast iron pipe flange covers 14
6 Technical Requirements 17
6:1 Flange material 17
6:2 Pressure-temperature ratings 17
6:3 Dimensional tolerance 19
6:4 Flange sealing surface roughness 20
6:5 Fasteners 20
6:6 Gasket 20
6:7 Processing and manufacturing 20
7 Pressure test 21
8 Inspection and Acceptance 21
8:1 Test 21
8:2 Acceptance 22
9 Signs and Markings22
9:1 Sign 22
9:2 Mark 22
10 Ordering requirements and packaging 22
Appendix A (Informative) Method for determining pressure-temperature ratings 23
A:1 General Principles23
A:2 Method for determining pressure-temperature ratings 23
Appendix B (Informative) System Hydraulic Test Pressure Reference Value 25
Foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents"
Drafting:
This document is Part 2 of GB/T 17241 "Cast Iron Pipe Flanges": GB/T 17241 has been published in the following parts:
--- Part 1: PN series;
--- Part 2: Class series:
This document partially replaces GB/T 17241:1-1998 "Types of cast iron pipe flanges", GB/T 17241:2-1998 "Types of cast iron pipe flanges"
GB/T 17241:3-1998 "Cast Iron Pipe Flange with Neck Thread", GB/T 17241:4-1998 "Cast Iron Pipe Flange with Neck Slip-On and Neck Socket Welding
Pipe flange", GB/T 17241:5-1998 "Tube end flange with loose sleeve cast iron pipe flange", GB/T 17241:6-2008 "Integral cast iron flange"
The Class series cast iron pipe flange content of GB/T 17241:7-1998 "Technical conditions for cast iron pipe flanges" series standards is consistent with the original document
In addition to structural adjustments and editorial changes, the main technical changes are as follows:
a) The original nominal pressure level identification is changed, such as changing the pressure level of the PN identification to the pressure level of the Class identification (see
4:1, Chapter 3 of GB/T 17241:1-1998);
b) Added dimension series and pressure grades, and added three pressure grades of grey cast iron: Class 25, Class 125, and Class 250
The types and sizes of pipe flanges, as well as the types and sizes of ductile iron pipe flanges of two pressure levels, Class 150 and Class 300:
Dimensions (see 4:1);
c) The malleable cast iron material grades (see Table 1 of GB/T 17241:7-1998) have been deleted;
d) Deleted grey cast iron materials HT300 and HT350 (see Table 1 of GB/T 17241:7-1998);
e) Added ductile iron materials QT400-18, QT450-10, QT450-18 and QT500-7 (see Table 20), deleted ductile iron
Iron material QT600-3 (see Table 1 of GB/T 17241:7-1998);
f) Added the selection principles of flange pressure temperature ratings and the requirements for flange use under extreme temperatures (see 6:2);
g) Changed the flange size tolerance requirements (see 6:3, Chapter 4 of GB/T 17241:7-1998);
h) The flange sealing surface roughness requirements have been changed (see 6:4, 5:2 of GB/T 17241:7-1998);
i) Added requirements for flange supporting products (bolts and gaskets) (see 6:5 and 6:6);
j) Added requirements for flange processing and manufacturing (see 6:7):
Please note that some of the contents of this document may involve patents: The issuing organization of this document does not assume the responsibility for identifying patents:
This document was proposed by the China Machinery Industry Federation:
This document is under the jurisdiction of the National Technical Committee for Standardization of Pipeline Accessories (SAC/TC237):
This document was drafted by: China Machinery Productivity Promotion Center Co:, Ltd:, Meide Group Co:, Ltd:, Xinxing Casting and Tube Co:, Ltd:, Liaoning
Aiweier Metal Forming Technology Co:, Ltd:, Anhui Tongfa Equipment Co:, Ltd:, Anhui Outaiqi Smart Water Technology Co:, Ltd:,
Shanxi Tianbao Group Co:, Ltd:, Hebei Jianzhi Casting Group Co:, Ltd:, Bonaswei Valve Co:, Ltd:, Gaoan Lux Machinery
Co:, Ltd:, Jiangyin Jintong Petrochemical Equipment Co:, Ltd:
The main drafters of this document are: Ren Yanqing, Feng Feng, Li Xiaoqin, Zuo Chao, Zhou Zhanhu, Jiao Xiangjing, Wang Jingyu, Wang Ronghui, Ai Chenguang, Hu Dawei,
Wang Daoqun, Yao Minghua, Lu Xiaobin, and Wang Xiaojuan:
The previous versions of this document and the documents it replaces are as follows:
---First published in:1998 as GB/T 17241:2-1998;
--- This is the first revision, incorporating GB/T 17241:1-1998 "Types of Cast Iron Pipe Flanges", GB/T 17241:3-1998
"Cast iron pipe flange with neck thread", GB/T 17241:4-1998 "Cast iron pipe flange with neck flat welding and neck socket welding",
GB/T 17241:5-1998 "Tube end flange with loose sleeve cast iron pipe flange", GB/T 17241:6-2008 "Integral cast iron method
The previous versions of GB/T 17241:6-2008 are: GB/T 17241:6-1998) and GB/T 17241:7-
Class series cast iron pipe flange content of:1998 "Technical Specifications for Cast Iron Pipe Flanges":
Introduction
Cast iron pipe flanges are widely used basic parts and connectors in pipeline systems: The original GB/T 17241 series of standards are mainly based on
Different flange types are divided into 7 parts: In order to unify the domestic and international standard system, simplify the number of standards, and facilitate domestic and foreign users to understand and use
This revision is integrated into the following two parts according to the nominal pressure series:
--- Cast iron pipe flanges Part 1: PN series;
--- Cast iron pipe flanges Part 2: Class series:
The two standards correspond to the two major flange series commonly used internationally, namely the PN series (Europe) and the Class series (America), and also supplement
And improve the relevant technical content in the design, manufacture, inspection and use of cast iron pipe flanges in my country, and improve the overall quality of domestic cast iron flanges:
Cast iron pipe flanges Part 2: Class series
1 Scope
This document specifies the types and parameters, types and dimensions, technical requirements, pressure tests, inspections, and other requirements of the Class series cast iron pipe flanges and flange covers:
Inspection and acceptance, marking and labeling, and supply requirements:
This document is applicable to gray cast iron and ductile iron, nominal pressure Class 25~Class 300, nominal size DN25~
DN1200 (NPS1~NPS48) cast iron pipe flange and flange cover:
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document:
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document:
GB/T 152:4 Fasteners - Countersunk holes for hexagonal head bolts and hexagonal nuts
GB/T 1047 Definition and selection of nominal sizes of piping components
GB/T 1048 Definition and selection of nominal pressure of pipeline components
GB/T 1348 Ductile iron castings
GB/T 9439 Grey iron castings
GB/T 12716 60° Sealing Pipe Thread
3 Terms and definitions
The terms and definitions defined in GB/T 1047 and GB/T 1048 apply to this document:
4 Types and parameters
4:1 Nominal pressure
This document specifies the following five pressure levels with nominal pressure marked by Class:
Class25 (grey cast iron), Class125 (grey cast iron), Class150 (ductile iron), Class250 (grey cast iron), Class300 (ductile iron
cast iron):
4:2 Nominal dimensions
This document specifies the following 21 specifications with nominal sizes marked by DN (NPS):
DN25(NPS1), DN32(NPS1⅟), DN40(NPS1⅟), DN50(NPS2), DN65(NPS2⅟), DN80
(NPS3), DN100 (NPS4), DN125 (NPS5), DN150 (NPS6), DN200 (NPS8), DN250 (NPS10),
(NPS24), DN750(NPS30), DN900(NPS36), DN1050(NPS42), DN1200(NPS48):
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 17241.2-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 17241.2-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 17241.2-2024_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 17241.2-2024_English will be deemed to be sold to your employer/organization who actually pays 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. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 17241.2-2024?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 17241.2-2024 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.
|