GB/T 3215-2025Centrifugal pumps for petroleum, petrochemical and natural gas industries (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document replaces GB/T 3215-2019 "Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries". Compared with GB/T 3215-2019, except for...

Aside from structural adjustments and editorial changes, the main technical changes are as follows.

---The definition of "traditional rigidity" has been changed (see 3.8, 2019 version 3.8);

---The term "maximum permissible speed" has been changed to "maximum continuous speed" (see 3.19, 2019 edition of 3.19);

---The definition of "maximum discharge pressure" has been changed (see 3.22, 2019 version 3.22);

---The pump classification designation has been changed (see Table 1, 2019 version of Table 1);

---Added the distinction and illustration for BB1 pump base mounting BB1-A and near-centerline mounting BB1-B (see 4.2.2.7);

---The illustrations for VS1, VS6, and VS7 pumps have been revised (see 4.2.2.12, 4.2.2.17, and 4.2.2.18; 4.2.2.12 in the 2019 version).

4.2.2.17 and 4.2.2.18);

---The requirement that the equipment have a service life of at least 20 years (excluding consumable parts) and a continuous operating life of at least 3 years has been removed (see 2019).

(6.1.1 of the 2018 edition)

---Added the requirement that the equipment must be buyer-approved and field-verified, and how to obtain field verification (see 6.1.1);

---Added the requirement that "for variable speed pumps (ASD), the seller shall determine the minimum permissible speed of the equipment and keep a record" (see 6.1.5);

---The NPSHA reference elevation requirements for vertical inline pumps and suspended pumps have been changed (see 6.1.8, 2019 version of 6.1.8);

---Added pumps with an outlet diameter greater than 80mm; at any given flow point within the pump's optimal operating range, the head between parallel pumps...

The difference should not exceed 3% (see 6.1.11);

---Added the requirement that the flow rate at the end of the curve be defined as 120% of the flow rate at the optimal efficiency point (see 6.1.12);

---The requirement that low specific speed pumps should indicate the expected flow limit on the quotation curve has been removed (see 6.1.12 of the 2019 version);

---Added the criterion relationship between minimum temperature rise in the cooling system and heat exchanger surface velocity, as well as the buyer's approval principle (see 6.1.20);

---The requirement for a self-priming pump with a front-mounted self-priming device has been added (see 6.1.22);

---Added information on the impact of on-site factors on pump performance, and on-site witnessing of the project by the seller's representative (see 6.1.27);

---The ANSI/ASME B1.1 thread specification has been amended (see 6.1.30, 6.1.29 in the 2019 edition);

---The definition of maximum discharge pressure has been changed (see 6.3.1, 2019 version of 6.3.1);

---Added the maximum operating pressure requirement for the hydraulic recovery turbine pressure housing and turbine outlet safety protection measures (see 6.3.5);

---Added operating conditions for radially split shells (see 6.3.9);

---Added requirements for the surface roughness of the sealing surface where the spiral wound gasket is placed (see 6.3.12);

---The requirement for cast iron flanges has been removed (see 6.4.2.2 in the 2019 version);

---The requirements for GB/T 13402 (Large Diameter Class) have been amended to explicitly specify that it refers to Series B flanges (see 6.4.2.2, 2019 version).

6.4.2.2);

---Added tolerance requirements for the outer diameter of Class flanges (see 6.4.2.3);

---Added requirements for selecting pipe thread connection methods (see 6.4.3.2);

---The interface material welded to the pump casing should be selected based on the temperature limit of 260°C for the piping material requirements (see...).

6.4.3.4);

---The requirement for cast iron pressure pump housings has been removed (see 6.4.3.6 in the 2019 version);

---The requirement of a 1.5mm gap between the end of the socket-welded pipe and the socket face has been added (see 6.4.3.6);

---The prerequisite for using pipe threads has been removed and adjusted to 6.4.3.2 (see 6.4.3.7 and 6.4.3.8 in the 2019 version);

---The requirement for a maximum pipe size of DN25 for auxiliary pipeline reinforcement has been added (see 6.4.3.10);

---The requirement for threaded interfaces on cast iron materials has been removed (see 6.4.3.11 in the 2019 version);

---Added requirements for threaded connections on sealing glands or pipeline pumps (see 6.4.3.11);

---Added requirements that shafts should be integral structures and that multi-segment shafts should be subject to buyer approval (see 6.6.9);

---Added a requirement that axis runout should be recorded relative to a permanent marking on the axis (such as a keyway) (see 6.6.13);

---A method for fixing non-metallic wear-resistant rings has been added (see 6.7.3);

---Added requirements for vertical TIR measurement of cantilever pumps (see 6.8.4);

---The requirements for the flushing hole interface at the center of the sealed cavity have been changed (see 6.8.9, 2019 version of 6.8.9);

---The naming conventions for steady-state and transient response analyses in torsion analysis and the torsion analysis flowchart have been changed (see 6.9.2, 2019 version).

6.9.2);

---The requirements for the vibration test point and probe installation orientation during performance testing have been changed (see 6.9.3.2, 2019 version 6.9.3.2);

---Added acceptance requirements for pump vibration values when operating at speeds between the maximum continuous speed and the trip speed (see 6.9.3.7);

---Added descriptions of bearing assemblies and requirements for bearing assemblies in oilfield and pipeline transfer pumps (see 6.10.1.1);

---The limit definitions have been modified, and the speed limit, bearing life limit, and energy density limit have been redefined (see...).

Version 6.10.1.1 (2019 version of 6.10.1.1)

---The applicable conditions for pipeline pump rolling bearing assemblies have been expanded (see Table 10);

---The lifespan of one of the two bearings was changed to be close to 40,000 hours, replacing the previous requirement of 25,000 hours.

Vague wording (see 6.10.1.6, 2019 version of 6.10.1.6);

---Added the requirement that, under specified conditions, angular contact bearings can be mounted on bushings and secured to the shaft with locking devices (see...).

6.10.1.8);

---The requirements for bearing housings of non-forced oil-lubricated bearings have been changed (see 6.10.2.2, 2019 version of 6.10.2.2);

---The requirements for the bearing housing surface temperature and bearing metal temperature of the pure oil mist lubrication system have been increased, and further requirements have been made for these requirements.

The step's annotation (see 6.10.2.4);

---Added requirements for the type of lubricating oil for bearings and bearing housings (see 6.11.1);

---Added a requirement that when providing non-metallic consumable parts, the material grade should be identified by adding the letter C (see 6.12.1.1);

---The supplementary description in the section on material selectivity testing and inspection has been deleted (see 6.12.1.5 in the 2019 edition);

---The condition for providing cast iron structural components has been removed (see 6.12.1.6 in the 2019 version);

---Added execution standards for welding requirements (see Table 11);

---Added implementation standards for magnetic particle and penetrant testing [see 6.12.3.3d];

---The material requirements for auxiliary piping welded to the alloy steel pump body have been changed (see 6.12.3.4, 2019 version of 6.12.3.4);

---The Celsius temperature values have been changed (see 6.12.4.2, 6.12.4.5, and the 2019 versions of 6.12.4.2 and 6.12.4.5);

---Added standards requiring electric motors to comply with (see 7.1.1);

---The requirements for the perpendicularity of the shaft to the mating surface of the drive mechanism and the flatness of the surface have been changed (see Figure 36, Figure 36 in the 2019 version);

---The balance quality level requirement has been changed from G6.3 to buyer-specified balance quality level (see 7.2.3, 2019 version of 7.2.3);

---The material composition of the coupling cover has been improved [(see 7.2.13)];

---A shaft guard has been added to the exposed area between the pump bearing housing and the mechanical seal, and the guard should be tested for volatile organic compounds.

Clauses regarding access routes, environmental factors, and ventilation, drainage, and other protective measures (see 7.2.13);

---Added four specific base types and three schematic diagrams of base types (see 7.3.1);

---Added a schematic diagram of the installation location of the OH2 type pump flushing scheme or auxiliary system, and the case of using a non-standard base (see 7.3.3);

---The requirement for reserved space for the threaded drain interface has been added (see 7.3.4);

---Added requirements for the minimum exposed area size of the mounting base plate used for leveling purposes (see 7.3.5);

---Added the requirement that the pump layout drawing should indicate the locations where mobile equipment is needed to complete the base grouting (see 7.3.10);

---Added requirements for side supports of non-grouting bases (see 7.3.13);

---Added requirements for non-grouting base universal joints, three-point mounting, anti-seismic spring brackets (AVM), spring brackets, or other types of mounting.

See 7.3.14;

---Requirements for welding and inspection of lifting lugs have been added (see 7.3.16);

---The quality requirements for the drive unit specified in the setting of the alignment set screw have been removed (see 7.3.17 in the 2019 version);

---The requirement for the seller to provide anchor bolts has been added (see 7.3.19);

---Added requirements for the standards that piping should comply with, and the priority of complying with these standards (see 7.5.1.1);

---Added the requirement that flange fasteners for lubricating oil stainless steel piping systems must be stainless steel, and stipulated that galvanized bolts are not acceptable (see...).

7.5.1.7);

---An additional requirement has been added for the blind flange and gasket sealing of the drain port (see 7.5.2.5);

---The requirement for cast iron housings has been removed (see 7.5.2.6 in the 2019 version);

---Added the requirement that the flange or butt flange on the first section of the connector pipe screwed into the sealing gland interface should be a slip-on flange (see...).

7.5.2.8);

---Added the condition for using threaded pipe connections for pipeline pumps with a maximum operating temperature not exceeding 55°C (see 7.5.2.9);

---The requirement that coolers should be used in parallel has been added (see 7.5.3.2);

---The scope of inspection or testing items agreed upon by the seller has been expanded (see 8.1.1);

---The requirement that straight welds on welded steel pipes used for manufacturing pressure pump housings must be 100% RT has been added (see Table 14);

---The requirements for the inner shell have been revised to Level 1 inspection for pressure shells and process piping materials (see 8.2.2.2, 2019 version 8.2.2.2);

---Added the implementation standards and instructions for material inspection in my country (see Table 15);

---The performance tolerance requirements for tests on pumps with a power output of less than 10kW have been increased (see Table 16);

---Increased the applicability of the hydrostatic test pressure coefficient (see 8.3.2.6);

---The chloride content specification has been changed from 50 mg/kg (50 ppm) to 100 mg/kg (100 ppm) (see...) 8.3.2.8 (2019 version of 8.3.2.8)

---The performance testing requirements have been changed (see 8.3.3.3, 2019 version of 8.3.3.3);

---Added the requirement that there should be no visible lubricating oil leakage during the pump's performance test (see 8.3.3.5);

---Added requirement to completely drain all residual water from BB3 and BB5 pumps after the final test (see 8.3.3.8);

---Added requirement that cavitation testing should comply with GB/T 3216-2016 (see 8.3.4.3.1);

---The requirements for the specified flow rate test point when conducting Class I cavitation tests have been changed (see 8.3.4.3.1, 2019 version 8.3.4.3.1);

---Added acceptance standards and improvement measures for bearing housing resonance tests; the continuous operating speed range should be specified for speed-regulating pumps.

See 8.3.4.7;

---Requirements for spare parts testing have been added (see 8.3.4.8);

---Added pre-shipment alignment and alignment report requirements (see 8.4.2);

---Added warning and precautionary requirements for equipment or materials containing or coated with chemicals (see 8.4.13);

---The requirement for connecting short pipes has been removed (see 9.2.1.5 in the 2019 version);

---The requirements for tightening the hydraulic bolts on the mating surface of the main housing of BB3 and BB5 pumps have been added (see 9.2.1.5);

---Acoustic analysis requirements have been added for the crossflow channels of BB3 and BB5 pumps (see 9.2.1.6);

---Added requirements for standard pump lubrication systems (see 9.2.6.2);

---Added a warning to exercise caution when selecting ISO 10438-2 forced lubrication systems (see 9.2.6.4);

---Added a requirement that no further testing is needed after final assembly (see 9.2.7.5);

---The requirements for the alignment screws of the horizontal adjusting shaft of the vertical suspension pump drive have been added (see 9.3.1.3);

---Added specifications for elliptical and flat heads, and the requirement that welds should be full penetration welds (see 9.3.2.4);

---Added the requirement that imported tanks or cylinders should use elliptical or spherical caps (see 9.3.2.5);

---The requirement that the welded steel pipe for the pressure pump casing and the pump head be 100% RT has been added (see 9.3.2.6);

---Added a provision requiring that pump heads, inlet tanks, or cylinders be manufactured using seamless steel pipes, and specifying the standards for the steel pipes (see 9.3.2.7);

---The requirement has been added that pumps with a guide shell outer diameter of less than.200mm can use 8mm fasteners (see 9.3.2.8);

---The requirements for the total runout value of the entire shaft length and the regulations for the runout value of ultra-long shafts have been removed (see 9.3.3.1 in the 2019 version);

---The requirement for installing shaft sleeves between stages of vertically suspended pumps has been removed (see 9.3.4.1 in the 2019 version);

---The content regarding maintaining a safe interval between the natural frequency and operating speed of vertical suspension pumps has been removed (see the 2019 version).

9.3.5);

---Added content on maintaining a safe distance between the natural frequency and operating speed of vertical suspension pumps, vibration mode analysis, and structural dynamics.

Notes on application and methods, and operational evaluation when the interval margin cannot be met, etc. (see note 9.3.5) 1, Note 2, Note 3 and Note 4);

---Added requirements for installing mechanical seals and rigid couplings for vertical pumps without integrated bearing housings, as well as the installation of mechanical seals.

The requirements for couplings in vertical pumps with integrated thrust bearing housings are specified, and a thrust bearing arrangement diagram for double couplings is added.

(Figure 42) (See 9.3.8.2);

---The component composition of the pressure housing of VS1 and VS2 pumps has been changed, clarifying that the only pressure component is the discharge seat (see 9.3.10.1, 2019).

Version 9.3.10.1);

---The component composition of the pressure housing of the VS3 pump has been changed, clarifying that the only pressure component is the discharge seat (see 9.3.11.1, 2019 version).

9.3.11.1);

---The clause concerning the pressure-bearing components of VS4 and VS5 type pumps that are required for pressurized closed systems has been deleted (see 9.3.12.3 in the 2019 edition);

---Increased the maximum suction pressure of VS4 and VS5 pumps in closed systems, as well as the pressure requirements of the sealing chamber, pump end cover, and tank end cover.

See 9.3.12.8;

---Added the requirement to include lifting method diagrams for pumps, packaging boxes, major components, and auxiliary systems in the drawings [see...] 10.2.2.1e)];

---Added requirements for cavitation specific speed and finite life design [see 10.2.3n) and 10.2.3q];

---The requirements for test facility restrictions have been changed from double-suction pump installation restrictions to speed restrictions [see 10.2.3o], 2019 version.

10.2.3o)];

---The timeline for buyer's document review has been changed, stipulating that the buyer should review the documents immediately upon receiving them from the seller (see 10.3.1.3, 2019 version).

(10.3.1.3)

---Specific requirements for progress reports have been added (see 10.3.3);

---Added the option to provide exploded views of equipment (see 10.3.4.1);

---The requirement that the seller should promptly provide the buyer with a final parts list has been removed (see 10.3.4.2 in the 2019 version);

---Added requirements regarding the format, quantity, and timeframe for providing the buyer with documentation materials for review and discussion (see 10.3.5.1);

---Some specific requirements regarding hoisting have been removed from the usage, maintenance, and technical data manuals (see 10.3.5.3 in the 2019 edition);

--- Changed the requirement that if the HPRT and other equipment in the unit cannot withstand the calculated runaway speed, an overspeed trip device should be provided.

Please find (see D.3.3.1, 2019 edition of D.3.3.1);

---The decision to provide a quick shutdown and switching system, previously recommended by device characteristics, is now determined by the buyer (see D.3.3.3).

(D.3.3.3, 2019 version)

---A diagram illustrating dual-drive has been added (see Figure D.1);

---The requirements for HPRT overspeed trip device testing have been changed from general reminders and recommendations to a user-determined decision regarding whether to conduct the test.

Requirements for fast trip device testing and overspeed trip testing (see D.4.4, 2019 edition of D.4.4);

---Added cantilever pump piping diagram scheme M, with cooling water leading to a sealed heat exchanger and a liquid storage tank heat exchanger (see Figure F.5);

---Added a two-end supported pump piping diagram scheme M, with cooling water leading to the heat exchanger between the seal and the storage tank (see Figure F.9);

---Added descriptions of the title, base, and gas station model (see Figure F.10);

---The four material grades I-1, I-2, S-1, and S-3 have been removed (see Appendix G of the 2019 edition);

---The material grades for some applications and the temperature ranges for some non-metallic materials have been changed (see Appendix G, see the 2019 edition).

Record G);

---The requirement to use 12% chromium steel in S-6 grade materials when the temperature of the medium conveyed by the boiler feedwater pump exceeds 175°C has been removed (see [link]).

Table G.1 (2019 edition)

---The guide shell material for VS6 and VS7 type pipeline pumps (not exceeding 55°C) can be selected as S-6 grade material (see Table G.1);

---The footnotes for grades I-1 and S-3 materials have been deleted (see Table G.1 in the 2019 edition);

---The technical specifications for pump component materials have been changed (see Table G.2, 2019 version of G.2).

---The technical specifications for materials used in pressure-bearing cast iron components have been removed (see Table G.2 in the 2019 edition);

---Added technical specifications for pipe fittings of 12% chromium steel grade, as well as footnotes for temperature application instructions (see Table G.2);

---Added a note regarding the preferred use of 304/304L austenitic stainless steel under moderate corrosion conditions (see Table G.2);

---The requirement for differential pressure on worn parts, limited to 25mm length units, has been removed (see G.3, 2019 edition);

---Added restrictions on threaded interfaces and requirements for flange connection bolts to be made of PTEF-coated alloy material or stainless steel (see...).

---Four standard base numbers (0.5~2.0) have been removed (see Appendix K in the 2019 edition);

---The position of the term and definition of "residual imbalance" has been changed (see 3.65, p.2.1 of the 2019 edition).

This document is modified to adopt ISO 13709:2009 "Centrifugal pumps for the petroleum, petrochemical and natural gas industries".

This document has undergone significant structural adjustments compared to ISO 13709:2009.A table comparing the structural numbering changes between the two documents is provided.

See Appendix A.

This document differs significantly from ISO 13709:2009.The relevant clauses are indicated in vertical margins.

Single lines (|) are indicated. A summary of these technical differences and their causes is provided in Appendix B.

The following editorial changes have been made to this document.

---Added a comment to section 5.3.1 explaining what a typical document also includes;

---Added a note to section 6.1.8 to remind users to pay attention to the NPSH baseline elevation;

---The comments for version 6.1.12 have been removed;

---Added a note to 6.1.13 explaining that operating within the range recommended in this clause typically yields the minimum power requirements;

---Corrected an error in the wording of ISO 13709:2009; in section 6.1.15 (see 6.1.6), change it to (see 6.1.4);

---Corrected an error in the wording of ISO 13709:2009; in Table 3, (6.1.24) was changed to (6.1.25);

---Added a note to 6.1.30 indicating that bolt coatings can affect thread grade and fastening requirements;

---The comment regarding maximum discharge pressure in section 6.3.1 has been removed;

---Notes 2 and 4 in section 6.3.5 concerning the ISO 7005-1 flange specification have been deleted;

---Added a note to section 6.4.2.1, explaining that disassembling the pump casing during maintenance does not require disassembling a large section of pipeline;

---Corrected an error in ISO 13709:2009 by changing 6.7.4c) (see Table H.4) to [see Table G.3 (corresponding)].

Table H.3 of ISO 13709:2009;

---Corrected the error in ISO 13709:2009 that section 6.3.5c was missing; in section 6.8.13, "[see 6.3.5c]" was changed to "(see 3.23 and 3.25)".

---Added a note to section 6.9.2.5, explaining the key focus on VFD torque response;

---The example in version 6.9.2.14 has been removed;

---Added note 1 to version 6.10.1.8, explaining the thrust bearing and shaft fit that some users are more accustomed to using;

---The footnote about "Monel" in 6.13.5 has been deleted;

---A note has been added to section 7.2.4, stating that the buyer may specify ISO 10441 coupling requirements;

---Added notes 1 and 2 to section 7.4.2.2, explaining the points that require special attention when selecting and configuring vibration detectors;

---Added a note to section 7.4.2.3 explaining the issues that need to be considered when using tilting pad radial bearings;

---Corrected an error in the wording of ISO 13709:2009 by changing "(see 6.4.3.10)" in sections 7.5.1.8 and 7.5.2.8 to "(see 6.4.3.11)".

---Corrected an error in the wording of ISO 13709:2009; changed "(see 6.1.8)" in section 8.3.3.3 to "(see 6.1.15)".

---Added a note to section 8.3.4.2.1 to explain the temperature variation range during which the oil temperature stabilizes;

---Corrected an error in the wording of ISO 13709:2009; changed 8.3.4.3.4 (see 8.3.3.5 and 8.4.3.1) to (see 8.3.3.7).

and 8.3.3.8);

---Added a note to section 9.3.13.5 explaining the function of the drain port;

---Corrected an error in ISO 13709:2009 by changing "predicted noise data (6.1.16)" in 10.2.3b) to "predicted".

The noise data (6.1.14)";

---Corrected an error in ISO 13709:2009 by changing footnote h in Table 20 from "Consumable parts (see 5.1.1)" to "Consumable parts (see 6.1.1);

---Added a copy of the electronic centrifugal pump datasheet in Appendix C;

---The link to spreadsheets in Appendix C has been removed;

---Corrected the labeling error in ISO 13709:2009 and adjusted the sequence of pump and motor numbers in Figure D.1 description;

---Added Notes 3 and 5 to Appendix E, along with the calculation formulas for specific speed and cavitation specific speed in my country;

---Corrected an error in ISO 13709:2009 by changing H.4 in subscript j of table G.1 to G.3 (corresponding to ISO 13709:2009).

(H.3 in the middle)

---Corrected an error in the wording of ISO 13709:2009; the corresponding standard for austenitic stainless steel and pressure castings in Table G.2 has been changed to "G".

Change "5121,CISCS16aSCS16AX" to "G5121,CISCS16ASCS16AX";

---Corrected the incorrect wording in ISO 13709:2009 by changing "T4" to "T5" in Annex H;

---The requirement to reference clause 9.1.1.3 in section I.1 has been removed;

---The life value of a single bearing L10h in Example 1 of I.2 has been changed from 37500h to 40000h;

---Some media categories, temperature ranges, and material grades in Appendix J have been changed;

---The terminology and definition of "residual unbalance" have been moved from J.2.1 in ISO 13709:2009 to Chapter 3;

---Added notes to Figure M.3 in Appendix M and legends of test points on typical test curves (see Figure M.4).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Pump Standardization Technical Committee (SAC/TC211).

Introduction

Users of this document should be aware that further or different requirements may be considered for specific applications. For specific applications, this document...

This does not preclude the seller from providing or the buyer from accepting alternative equipment or engineering solutions. These special applications are particularly suitable for innovative or new technologies.

In cases where technical requirements exist, if alternative equipment or engineering solutions are provided, the seller must identify all differences from this document and...

Provide corresponding detailed instructions.

The "-" symbol preceding any clause or sub-clause in this document indicates that the content of that clause requires a decision by the buyer or requires the buyer to provide detailed information.

Information. Detailed information is provided in the data table or described in the request for quotation/purchase order (see Figures C.1 to C.3).

The units of the data in parentheses in this document are US units or other units.

Centrifugal pumps for the oil, petrochemical and natural gas industries

1 Scope

This document specifies the requirements for centrifugal pumps used in the oil, petrochemical, and natural gas industries, including hydraulic recovery turbines used for energy recovery via pump reversal.

(HPRT).

This document applies to cantilever pumps, end-supported pumps, and vertically suspended pumps (see Table 1). The requirements specified in Chapter 9 apply to specific...

Pump type. Other clauses apply to all pump types. This document provides schematic diagrams and corresponding type codes for various specified pump types.

Relevant industry experience indicates that pumps manufactured in accordance with this document are suitable for conveying liquids exceeding any of the following conditions.

---Discharge pressure (gauge pressure). 1900 kPa;

---Inhalation pressure (gauge pressure). 500 kPa;

---Conveying temperature 150°C;

---Operating speed 3600 r/min;

Rated head. 120m;

---Cantilever pump impeller diameter 330mm.

Note. For sealless pumps, refer to API Std 685.For heavy-duty pumps used in industries other than oil, petrochemical, and natural gas, refer to ISO 9905.

According to the regulations.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 193 Standard Thread Diameters and Pitches (GB/T 193-2003, ISO 261:1998, MOD) GB/T 196 Basic Dimensions of Ordinary Threads (GB/T 196-2003, ISO 724:1993, MOD) GB/T 197 Tolerances for Standard Threads (GB/T 197-2018, ISO 965-1:2013, MOD) GB/T 755 Ratings and Performance of Rotating Electrical Machines (GB/T 755-2019, IEC 60034-1:2017, IDT) GB/T 1800.1 Product Geometric Specification (GPS) - Linear Dimensional Tolerances - ISO Notation System - Part 1: Tolerances, Deviations and the basis for the coordination (GB/T 1800.1-2020, ISO 286-1:2010, MOD) GB/T 1800.2 Product Geometric Specification (GPS) - Linear Dimensional Tolerances - ISO Notation System - Part 2: Standard Tolerance Zones Codes and Limit Deviation Tables for Holes and Shafts (GB/T 1800.2-2020, ISO 286-2:2010, MOD) GB/T 2516 Limit Deviations for Ordinary Threads (GB/T 2516-2023, ISO 965-3:2021, MOD) GB/T 3216-2016 Acceptance tests of hydraulic performance of rotary power pumps, Class 1, 2 and 3 (ISO 9906:2012, IDT) GB/T 4604.1-2012 Rolling bearing clearance - Part 1: Radial clearance of radial bearings (ISO 5753-1:2009, IDT) GB/T 5677-2018 Radiographic Inspection of Castings GB/T 6391-2010 Rolling bearings - Rated dynamic load and rated life (ISO 281:2007, IDT) GB/T 7233 (all parts) Ultrasonic testing of cast steel parts Note. GB/T 7233.1-2023 Ultrasonic testing of cast steel parts – Part 1: General purpose cast steel parts (ISO 4992-1:2020, MOD) GB/T 7233.2-2023 Ultrasonic testing of cast steel parts – Part 2: High pressure cast steel parts (ISO 4992-2:2020, MOD) GB/T 7307 55° Non-sealing pipe thread (GB/T 7307-2001, eqv ISO 228-1:1994) GB/T 8196 General requirements for the design and manufacture of fixed and movable protective devices for machinery (GB/T 8196-