ASTM D4746
Standard Test Method for Determination of Quinoline Insolubles (QI) in Tar and Pitch by Pressure Filtration
Available Formats:
- Availability: Immediate Download
- Language: English
- License Type: Single User
- Updates: Not Included
- Availability: Request Quote
- Language: English
- License Type: Enterprise / Multi User
- Updates: Included
About This Item
ASTM D4746 is the ASTM standard for determining quinoline insolubles (QI) in tar and pitch by pressure filtration. It provides a technical basis for measuring the insoluble fraction in these carbonaceous materials, helping users compare material quality and evaluate suitability for downstream use. As a focused test method, it supports more consistent laboratory reporting and better control of product characteristics where QI content may affect performance, processing behavior, or acceptance decisions.
Purpose of ASTM D4746
The purpose of ASTM D4746 is to define a reliable test method for determining quinoline insolubles in tar and pitch using pressure filtration. The standard is designed to give users a consistent way to assess the insoluble portion of a sample under controlled test conditions. This is useful when the QI level is an important quality indicator, since it can influence interpretation of material cleanliness, consistency, and general technical suitability in inspection or release testing.
Common use cases of ASTM D4746
This standard is commonly used in laboratories that test tar and pitch samples for quality control, incoming inspection, or product evaluation. It is relevant where quinoline insolubles are part of the specification or buyer-seller agreement, and where pressure filtration is used to support repeatable measurement. ASTM D4746 may also be used in routine compliance testing and comparison of batches when consistent characterization of tar or pitch is needed for technical decision-making.
Why ASTM D4746 matters
ASTM D4746 matters because it helps reduce variation in how quinoline insolubles are measured and reported. For organizations that handle tar and pitch, a standard method supports more dependable results across laboratories, suppliers, and production lots. That consistency can improve procurement decisions, quality control, and acceptance testing. Using a recognized ASTM standard also helps align testing practices with documented requirements, which can lower the risk of disputes or misinterpretation.
- Quinoline insolubles determination
- Tar and pitch testing
- Pressure filtration method
- Quality control support
- Consistent laboratory reporting
- Publication Date: 2020-07-31
- Publisher: ASTM
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Summarize with AI
Get quick summaries using your favorite AI engine.
Online Standart Disclaimer
OnlineStandart.com is an authorized reseller of international standards, operating through partnerships with authorized distributors. We do not own the copyrights or trademarks of the standards we sell, including but not limited to those of API, ASHRAE, BSI, SAE, ASTM, IEEE, IEC, ASME, ISO, and others.
All product names, logos, and brands are the property of their respective owners and are used for identification purposes only; their use does not imply endorsement. OnlineStandart.com is not affiliated with or endorsed by any standards development organization unless explicitly stated. The content of this document is for informational purposes only and is intended to promote our licensed reselling services.
Online Standart does not host, distribute, or link to free, unlicensed, or uncertified copies of copyrighted standards. Every document we deliver is a licensed copy obtained through authorized channels and supplied with full licensing documentation. The “Free PDF Download” option on our product pages refers to this free informational document — never to a free copy of any standard.