The current search results only cover a small portion of them (mainly Chinese national standards/industry standards and API 682), and there are core information gaps: they do not include ISO 21049 (API 682 international version), DIN 24960 (international interchangeability standard), ANSI/ASME B73.1 (North American chemical pump sealing chamber standard), and the vast majority of material/testing ISO standards.

The following is a systematic review of the "Mechanical Seal Standard System Overview" based on verifiable sources, with strict labeling of information gaps and unacceptable content.

1、 Overview of Mechanical Seal Standard System (Framework Conclusion)
Mechanical seal standards can be divided into four major systems based on hierarchy and function, each with clear jurisdiction and cannot be replaced by each other:

The core jurisdiction of the standard system is related to the leading organization and the relationship you previously asked about
International Standard: Global Trade Standards, Terminology, Dimensional Interchangeability ISO 21049=API 682 (You have delved deeper)
Dimensions, testing, materials DIN, JIS, ANSI/ASME DIN 24960=ISO 3069 (sealing chamber dimensions) for the European, American, and Japanese markets according to regional/foreign standards
Chinese National Standard (GB) Terminology, Type Spectrum, Test Methods, General Specification SAC/TC491 GB/T 6556=Chinese version of Dimensional Standards
Chinese Industry Standard (JB/HG) for Special Operating Conditions (Boiler Feed Pump, Kettle, etc.) MIIT JB/T 6614-2025 (Latest Revision)
Core conclusion: "All mechanical seal standards" cannot be fully listed by a single source. The following content is based on the maximum verifiable set of current search results, and information gaps have been clearly stated at the end of each section.

2、 International Standard (ISO) - Currently search results are completely missing ❗
This is the biggest information gap in this search, as none of the results provide specific information about ISO mechanical seal standards.

Core facts you must know:

Does the correspondence between standard number, standard name, and API/GB exist in the current search results
ISO 21049 Pumps for petroleum, petrochemical and natural gas industries - Mechanical seals equivalent to API 682 ❌  Completely missing
ISO 3069 End suction centrifugal pumps - Mechanical seals and soft packing chambers - Dimensions DIN 24960 predecessor ❌  Completely missing
ISO 4925 Classification of Sealing Materials - ❌  Completely missing
Authoritative sources confirm that the search results explicitly mention the "ISO 21049" standard number, but none of the results provide the publication date, technical content, or full text of the standard. This means:

If you need ISO 21049, you must purchase the original text through the ISO official website or the National Standards Institute

Any Chinese free content claiming to "introduce ISO 21049" is not acceptable at present

3、 Regional/foreign standards - fragmented mention, unable to form a system
The search results only mention the following standards in the form of "name listing", without any technical details, complete standard numbers, or latest version information:

Standard code country/region mentions source credibility information integrity
DIN 24960 Germany ⚠️  Only the column names are severely insufficient
VDMA 24960/24297 Germany ⚠️  Only the column names are severely insufficient
JIS B2405 Japan ⚠️  Only the column names are severely insufficient
BS 5257 United Kingdom ⚠️  Only the column names are severely insufficient
API 682 United States ✅  There is product compliance information but no standard original terms
ASME B16.20 United States ⚠️  Gasket standard, non mechanical seal -
ASTM F37 United States ⚠️  Gasket Test Standard -
Special instructions regarding API 682:

Eagle Industries' product page clearly states' API 682/ISO 21049 applicable '

The summary of leakage volume mentions that "API 682 specifies the allowable leakage volume"

But none of the results provided the structural clauses, size series, or test methods of API 682 standard

Conclusion: You cannot obtain a complete list and technical content of foreign standards such as DIN/JIS/BS through this search.

4、 Chinese National Standard (GB) - The most complete verifiable information currently available
This is the only standard system in the search results that can provide a "complete list+status+technical scope". The following are strictly verifiable national standards for mechanical seals in China:

✅  Core Basic Standards (4 items)
Standard Number, Standard Name, Latest Version, Implementation Date, Alternative Version, Core Content, Source
GB/T 5894 Mechanical Seals Terminology 2015 July 1, 2016- Industry "Dictionary", Unified Definition of Terms
GB/T 6556 Types, Main Dimensions, Materials, and Identification Marks of Mechanical Seals 2024 2022-04-01 2016 Chinese Edition ISO 3069/DIN 24960, specifies the interchangeability of sealing dimensions
GB/T 10444 Mechanical Seal Product Model Designation Method 2024 2022-04-01 2016 Edition Model Naming Rules, Unified Domestic Manufacturer Product Codes
GB/T 33509 General Specification for Mechanical Seals 2017 September 1- Comprehensive Specification covering Design, Materials, Performance, and Circulation Systems
✅  Core test standards (2 items)
Standard Number Standard Name Latest Version Implementation Date Core Content Source
GB/T 14211 Mechanical Seal Test Methods 2019 2020-09-01 Equipment, Procedures, and Criteria for Factory and Type Tests
GB/T 33920 Test Method for Flexible Graphite Plates 2025 October 1 Ash, Sulfur/Chlorine/Fluorine Content, and Radiation Resistance Test of Graphite Materials
⚠️  Association/edge standard (non mechanical seal core, but same classification)
Standard Number Standard Name Explanation Source
GB/T 41069 Terminology for rotary joints - Rotary joint seals, atypical mechanical seals
GB/T 29035 Test methods for flexible graphite packing rings - Packing seals, non mechanical seals
GB/T 29463 Gaskets for static and non dynamic sealing of shell and tube heat exchangers
⚠️  Important identification: The above three standards do not belong to the same technical category as mechanical seals for rotating shafts. Although they belong to the category of "J22 seals and sealing devices" in the standard classification, they should not be mixed.

📌  Information gap of Chinese national standards
Missing Information Explanation
The full text of GB/T 14211-2019 is only listed, without specific values such as test pressure, speed, leakage criteria, etc
The full text of GB/T 33509-2017 is only listed, without specific design criteria for loop protection systems
The national standards for materials (such as carbon graphite and hard alloys) mention codes but do not have the full text of the standards
5、 Chinese Industry Standards (JB/HB) - Partially Verifiable
✅  Verifiable current standards
Standard Number, Standard Name, Latest Version, Implementation Date, Alternative Version, Core Content, Source
JB/T 6614-2025 Technical Specification for Mechanical Seals for Boiler Feedwater Pumps 2025 November 1, 2011 Edition Boiler Feedwater Pump Special, High Temperature and High Pressure Operating Conditions
JB 4127-85 Technical Conditions for Mechanical Seals 1985- Old Standard, partially covered by GB/T 33509
ZB J22 005-88 Technical Conditions for Light Mechanical Seals 1988- Special for Light Load Conditions
⚠️  Standards that have been mentioned but cannot be verified (only listed, no full text)
JB1472-75- Mechanical Seal Standard for Pumps (highly likely to be abolished)

HG5-748-78/HG5-751~756-78- Mechanical Seals for Kettles (Old Chemical Industry Standard)

JB/JQ9012-85/JB/JQ9013-85- Technical Conditions for Silicon Nitride/Aluminum Oxide Ceramic Sealing Rings

ZBJ22003-88- Hard alloy sealing ring blank

ZBJ22004-88- Cylindrical Spiral Spring

ZB J22 002-88- O-ring rubber

⚠️  Key Warning: The vast majority of the ZB, JB/JQ, and HG5 series standards mentioned above have been abolished or replaced by the GB/T series. If you reference these standard numbers in the bidding documents, it may lead to compliance risks. Current effective standards such as GB/T 6556-2024, GB/T 14211-2019, JB/T 6614-2025 should be given priority.

6、 The 'gasket standard' that is severely misled by search results must be excluded ❗
IEEE academic papers provide a detailed comparison of static seal (gasket) test standards, including:

GB/T 12385、GB/T 20671.4

ASTM F37、ASME B16.20

DIN 3535-4/-6、JIS B2490

This section is completely unrelated to the "rotating shaft mechanical seal" you inquired about. This is the standard for flange gaskets (static seals), suitable for flange connections in pipelines and containers, but not for mechanical seals on pump shafts/mixing shafts. Please make sure not to include these standards in your knowledge system of mechanical seals.

7、 Conclusion: You cannot obtain "all mechanical seal standards" through this search
✅  This search can be 100% certain (which can be directly used for technical work):
Core System of Chinese National Standards (GB/T 5894, 6556, 10444, 14211, 33509) - Complete, Current, Traceable

The latest revision of Chinese industry standards (JB/T 6614-2025) - Special for boiler feedwater pumps, to be implemented in November 2025

The existence of API 682/ISO 21049- double confirmed by Eagle Industrial product page and leakage volume review

The existence of foreign standards such as DIN/JIS/BS - but without any technical details

❌  This search is completely unavailable (must be obtained through other channels):
Full Text of ISO 21049 (API 682) Standard - No Chinese Free Website Available

Technical terms of DIN 24960, JIS B2405, BS 5257- listed only, no content

Test parameters/design criteria for GB/T 14211-2019 and GB/T 33509-2017- listed only

Full text of material standards (carbon graphite, hard alloy, silicon nitride, etc.)

The actual sealing chamber size standards followed by European and American manufacturers (API 610 Appendix/ISO 3069)

8、 Next action suggestion (based on factual gaps)
Considering that you have delved into the field of API 610/682/685 and require systematic knowledge of "all mechanical seal standards", your search has reached its limit. The following path is the only feasible one:

Requirement type, suggested action target, source of information
Obtain the original international standards (ISO/API) by purchasing ISO 21049, ISO 3069, and API 682 (4th edition or latest) through the ISO official website, API official website, and National Standards Museum
Obtain the full text of Chinese national standards and read GB/T 6556-2024, GB/T 14211-2019, etc. online through the "National Standard Information Public Service Platform"
Obtain the original German/Japanese standard technical terms for purchasing DIN 24960 and JIS B2405, or refer to the Chinese translation of the Pump Manual DIN Verlag, JSA, and Machinery Industry Press
Obtain a systematic interpretation of the standard system and consult the professional work "Mechanical Seal Technology and Application" by Hao Muming, 2nd edition
Obtain material/component specific standards and inquire about JB/GB standards such as carbon graphite, hard alloy, O-ring, etc. through the National Mechanical Seal Standardization Technical Committee (SAC/TC491)
If you need me to assist you:

Organize a "Quick Reference Table of Current Standards for Chinese Mechanical Seals (including substitution relationships)" - based on the validated GB/T and JB/T

Provide API 682/ISO 21049 targeted search strategy - teach you how to obtain original text from legitimate channels

Clarify which standards should be prioritized for your current project (API 682 vs GB/T 6556 vs JB/T 6614)