GB/T 34875-2017 English PDF

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GB/T 34875-2017: Shaft sealing systems for centrifugal and rotary pumps
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34875-2017	3079	Add to Cart	13 days	Shaft sealing systems for centrifugal and rotary pumps	Valid

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Basic data

Standard ID: GB/T 34875-2017 (GB/T34875-2017)
Description (Translated English): Shaft sealing systems for centrifugal and rotary pumps
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J71
Classification of International Standard: 23.080
Word Count Estimation: 154,168
Date of Issue: 2017-11-01
Date of Implementation: 2018-05-01
Regulation (derived from): National Standard Announcement 2017 No. 29
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34875-2017: Shaft sealing systems for centrifugal and rotary pumps

---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.
Shaft sealing systems for centrifugal and rotary pumps ICS 23.080 J71 National Standards of People's Republic of China Shaft seal system for centrifugal pump and rotor pump (ISO 21049.2004, Pumps-Shaft valves systems for centrifugaltrifugal androtarypumps, IDT) Posted.2017-11-01 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword V. Introduction Ⅵ 1 Scope 1 2 Normative references 1 3 Terms and definitions 3 4 seal system 10 4.1 Sealing Category, Type and Arrangement 10 4.1.1 General 10 4.1.2 Seal Category 10 4.1.3 sealed type 10 4.1.4 Sealing arrangement 11 4.1.5 sealed orientation 11 4.2 Goal 11 4.3 Sealing System Requirements and/or Procurement 11 5 General 18 5.1 unit responsibility 18 5.2 unit system 18 6 design requirements 19 6.1 General design requirements (all categories) 19 6.1.1 General requirements 19 6.1.2 Seal chamber and gland 21 6.1.3 cartridge seal sleeve 27 6.1.4 Non-compensated rings 28 6.1.5 Elastic Elements 29 6.1.6 Materials 30 6.2 Design Requirements (Category Characteristics) 33 6.2.1 Type 1 seal 33 6.2.2 Type 2 seal 34 6.2.3 Type 3 seal 35 7 sealed the specific structure 35 7.1 Arrangement 1 Seal 35 7.1.1 Sealing sleeve 35 7.1.2 Seal chamber and gland 35 7.2 Arrangement 2 Seal 36 7.2.1 General 7.2.2 Seal sleeve 36 7.2.3 Seal chamber and gland 7.2.4 Contact wet seal with buffer system (2CW-CW) 37 7.2.5 Inside Contact Wet Seal Dry Run Seal (2CW-CS) Seal Chamber and Gland 37 7.2.6 Inner non-contact seal Dry-run suppression seal (2NC-CS) Seal chamber and gland 38 7.3 Arrangement 3 Seal 38 7.3.1 General 38 7.3.2 sealing sleeve 38 7.3.3 Seal chamber and gland 39 7.3.4 Contact Wet Seal with Isolation Fluid System (3CW-FB, 3CW-FF, 3CW-BB) 39 7.3.5 Non-Contact Seal with Isolated Gas System (3NC-FB, 3NC-FF, 3NC-BB) Standard Types and Arrangements 39 Annex 8.1 auxiliary piping system 40 8.2 Mechanical seal flushing/cooling system (group Ⅰ) 42 8.3 quench system (Ⅱ group) 42 8.4 Cooling water system (group Ⅲ) 43 8.5 Accessories and Auxiliary System Components 43 8.5.1 hydrocyclone 43 8.5.2 orifice plate 44 8.5.3 seal wash cooler 45 8.5.4 Isolation/Buffer Fluid Tanks 45 8.5.5 Guidelines for the Selection of Isolation/Buffer Fluids 47 8.6 Positive Circulation Device to Isolate/Buffer Fluids and Seal Fluids 47 8.6.1 Overview 47 8.6.2 Inner Circulation Device 8.6.3 External circulation pump 48 8.6.4 External seal flushing system 48 8.6.5 Condensate collector 48 8.6.6 Isolation/Buffer Gas Supply System 49 9 meters 49 9.1 General 49 9.2 Thermometer 49 9.3 thermometer casing 49 9.4 Pressure gauge 50 9.5 switch 50 9.5.1 Alarm, Trip and Control Switches 50 9.5.2 Pressure switch 50 9.5.3 Level switch 50 9.5.4 Flow Switch 51 9.6 level gauge 51 9.7 Flow Meters 51 9.7.1 Traffic Indicator 9.7.2 Flowmeter 51 9.7.3 Flow Transmitter 51 9.8 safety valve 51 9.9 Regulating valve 51 9.10 Turbocharger 10 Inspection, testing and preparation before delivery 52 10.1 General 52 10.2 Check 52 10.3 Test 53 10.3.1 seal certification test 53 10.3.2 Hydrostatic test of mechanical seals and fittings 10.3.3 Seal manufacturer's seal test 62 10.3.4 Gas test 62 10.3.5 Pump manufacturer's seal test 62 10.4 Preparation before delivery 62 Information transfer 63 11.1 General 63 11.2 Recommendation Information 63 11.3 Contract Information Appendix A (informative) Recommended seal selection process 67 Appendix B (Informative) Seal chamber and mechanical seal components typical material standards 94 Appendix C (Normative) Mechanical Seal Data Sheet Appendix D (informative) Mechanical seal code 107 Appendix E (Normative) Sealed seller and pump seller responsibility division 109 Appendix F (informative) Calculation of heat and endotherm 111 Appendix G (Normative) Standard Flush Solutions and Aids 116 Appendix H (Informative) Inspector's Seal Checklist 138 Appendix I (Normative) Mechanical seal certification test table 139 Appendix J (Normative) Mechanical Seal Data Requirements Table 141 Appendix NA (informative) Normative references to the international documents corresponding to the consistency of our document 142 Appendix NB (Informative) Seal Chamber and Mechanical Seal Parts Typical Materials Standard (Chinese Standard) 144 References 146

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the translation method identical with ISO 21049.2004 "shaft and rotor pump seal system." For the documents of our country which have correspondence with the international documents that are normative references in this standard, please refer to Appendix NA. For ease of use, this standard made the following editorial changes. --- Modify the standard name; --- Unit of measurement using the SI system; --- Removed the cover of ISO 21049.2004, Preface, Special Notes, PDF Disclaimer; --- In 4.1.2, increase the page Note 10), to simplify the text to describe the absolute pressure; --- As this standard uses the International System of Units, the modification of the ISO 21049.2004 5.2 expression; --- Modify the error in ISO 21049.2004, in Appendix C, modify the ISO 21049.2004 Appendix C Type A seal, B-type seal and C-type seal corresponding to the definition of Chapter; --- Modify the error in ISO 21049.2004, in order to ISO 21049.2004 specified in 8.5.4.4.8 pipe diameter (12mm), altering the textual descriptions in Figure G.26, explanations 7 and 9 in Figure G.27 and Figure G.28, --- Increasing the informative appendix NA, and the normative references in this standard have consistent correspondence between the international documents of our documents; --- Increased information appendix NB, seal chamber and mechanical seal components typical material standards (Chinese standard); --- In the reference, an increase of appendix NB reference to our file. This standard is proposed by the China Machinery Industry Federation. This standard by the National Standardization Technical Committee pump (SAC/TC211) centralized. This standard was drafted unit. Hefei Hua Sheng Valve Co., Ltd., Shanghai Oriental Pump (Group) Co., Ltd., Shanghai Kai-chuen Pumps (set Mission) Co., Ltd., Shanghai KSB Pump Co., Ltd., Jialite Ebara Pump Co., Ltd. Guangdong Ken Fu to pump Co., Ltd., Shenyang Pump Research Institute, Dandong Clone Group Co., Ltd., Hefei new Shanghai shield Pump Co., Ltd., Shanghai Liancheng (Group) Co., Ltd., Anhui Lan Seals Co., Ltd., Shandong Seiko Pump Co., Ltd., Shandong Shuanglun Co., Ltd., New Territories Pump Group Co., Ltd., Jiangsu Wu new Pump Co., Ltd., Hunan Hunan Electric Changsha Pump Co., Ltd., Sinopec Guangzhou Engineering Co., Ltd., Shandong Shuobo Pump Co., Ltd., Zhejiang Jiang Cole Pump Co., Ltd., Shanghai on Han Automation Technology Co., Ltd., Hangzhou alkali pump Limited, China Power Construction Group Shanghai Energy Equipment Co., Ltd., Shandong Tianrui Heavy Industries Co., Ltd. The main drafters of this standard.He Yujie, Liu Weiwei, Wang Yanhe, Pan Zaibing, Qu Jingtian, Mo Yu Shi, Dong Qinmin, Li Jiming, Hu Xiaojun, Song Qingsong, Huang Bingxi, Li Juan, Teng Zhaogang, Ling Guirong, Liu Ming, Li Pujiang, Yang Chengjiong, Wang Guanchao, Chi Wu, Chen Yongjun, Chen Qian, Wu Xinmei, Zhao Xin, Li Yongsheng.

Introduction

This standard is based on the knowledge and experience accumulated by manufacturers and users of equipment in the oil, gas and chemical industries but its application does not Limited to these industries. Users of this standard should note that for standalone applications, higher or different requirements may be required. This standard does not exclude the seller Provide, or Buyer acceptance of replaceable equipment or stand-alone application of technical solutions. This standard can be devoted to technological innovation or improvement purposes. in Before providing an alternative, the seller should confirm any changes to this standard and provide details. The purpose of this standard is to help buyers choose and use pump mechanical seals. This standard is an independent seal standard, used as a normative reference in ISO 13709. This standard applies to the new pump and change Type pumps as well as pumps other than those specified in ISO 13709 (eg pumps in ASMEB73.1, ASMEB73.2 and API676). The black dots (•) in front of the chapter numbers indicate that the contents of the article need to be decided by the buyer or require the buyer to provide detailed information, as detailed Detailed information should be shown in the datasheet or on the RFQ or purchase order (see example in Appendix C). Shaft seal system for centrifugal pump and rotor pump

1 Scope

This standard specifies the oil, natural gas, chemical industry, centrifugal pumps and rotor pump seal system with the technical requirements and gives a recommendation see. This standard is mainly applicable to dangerous, flammable and/or toxic sealing system, in order to improve the equipment intact rate and reduce to the atmosphere Emissions and reduced life-cycle sealing costs, these occasions require equipment with higher reliability. This standard specifies the pump seal shaft diameter The range is 20mm ~ 110mm. This standard also applies to sealed spare parts and existing equipment upgrade reference. This standard covers the sealing configuration by type, type, layout And directional way to classify.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. ISO 7 (all parts) with threaded pipe thread (Pipethreadspressure-tightjointsaremadeon thethreads) ISO 261 Common thread diameter and pitch series (ISO general-purposemetricscrewthreads-Generalplan) ISO 262 General thread screws, bolts and nuts Selection of dimensions (ISO general-purposemetricscrewthreads-Se- lectedsizesforscrews, bolts, andnuts) ISO 286-2 Limits and Matching Part 2. Standard Tolerance Levels and Holes, Axis Limit Deviation Tables (ISO system of limits and fits-Part 2.Tablesofstandardtolerancegradesandlimitdeviationsforholesandshafts) ISO 724 ordinary thread basic dimensions (ISO general-purposemetricscrewthreads-Basicdimensions) ISO 965 (all parts) General thread tolerances (ISO general-purposemetricscrewthreads-Tolerances) ISO 3069 axial suction centrifugal pumps for mechanical seals and soft packing cavity size (End-suctioncentrifugalpumps-Di- mensionsofcavitiesformechanicalsealsandforsoftpacking) ISO 4200 Dimensions and unit length quality of welded and seamless flat steel tubes (Plainendsteeltubes, wel- dedandseamless-Generaltablesofdimensionsandmassesperunitlength) ISO 7005-1 metal flange Part 1. Steel flanges (Metalicflanges-Part 1.Steelflanges) ISO 10438 (All Sections) Lubrication, Shaft Seal, Oil Control Systems and Auxiliary Equipment for the Petroleum, Heavy Chemical and Gas Industries (Petroleum, petrochemicaland naturalgasindustries-Lubrication, shaft-sealing and control-oilsystems and auxiliaries) ISO 13709 Centrifugal pumps for petrochemical, petrochemical and naturalgasindustries) ISO 15649 Pipelines for the Oil and Gas Industry (Petroleumand naturalgasindustries-Piping) IEC 60079 (all parts) Electrical equipment for explosive gas atmospheres (Electricalapparatusforexplosivegasat- mospheres) IEC 60529 Enclosure Rating (IP Code) [Degreesofprotectionprovidedbyenclosures (IPcode)] AISI American Iron and Steel Institute standards, specifications and technical requirements (Standards, codesandspecificationsoftheAmerican ......

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