GB/T 34875-2017Shaft sealing systems for centrifugal and rotary pumps (English PDF)

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.

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, 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