ISO 3675-1998 rus PDF
Name in English:
St ISO 3675-1998 rus
Name in Russian:
Ст ISO 3675-1998 rus
Original standard ISO 3675-1998 rus in PDF full version. Additional info + preview on request
Full title and description
Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method (ISO 3675:1998). This International Standard specifies the laboratory procedure using a glass hydrometer to determine density at the reference temperature (15 °C) for crude petroleum and related liquid petroleum products handled as single-phase liquids.
Abstract
ISO 3675:1998 gives a laboratory hydrometer method for measuring the density (mass per unit volume) — and related measures such as relative density / specific gravity or API gravity — of crude petroleum and liquid petroleum products. It describes sample handling, temperature control (reference 15 °C), meniscus and meniscus-correction procedures for opaque liquids, and limitations related to vapour pressure and viscosity.
General information
- Status: Published (International Standard).
- Publication date: June 1998 (Edition 3).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 75.080 (Petroleum products in general).
- Edition / version: Edition 3 (1998).
- Number of pages: 10 pages.
Key bibliographic and status details are listed on ISO’s catalog entry for ISO 3675:1998.
Scope
This standard applies to laboratory determination, using a glass hydrometer, of density at 15 °C of crude petroleum, liquid petroleum products and mixtures normally handled as liquids and having limited vapour pressure. It is suitable for transparent mobile liquids and includes guidance for viscous or opaque liquids (temperature-controlled baths and meniscus corrections). The method is intended for single-sample laboratory work rather than in-line process instrumentation.
Key topics and requirements
- Hydrometer-based measurement principle and apparatus (glass hydrometer calibrated at the reference temperature).
- Reference temperature: density values reported at 15 °C; readings at other temperatures must be corrected to the reference using appropriate tables/procedures.
- Applicability: mobile transparent liquids; procedures for viscous liquids (temperature control) and opaque liquids (meniscus correction table).
- Vapour-pressure limitation for typical use (restrictions on samples with high Reid vapour pressure to avoid loss of light ends during handling).
- Requirements for sample conditioning, temperature control, repeatability and reporting of conditions and corrections applied.
These topics summarize the standard’s technical content and user requirements for reliable hydrometer density determinations.
Typical use and users
Laboratories and quality-control departments in refineries, fuel terminals, trading companies, inspection bodies and standards laboratories use ISO 3675:1998 for custody-transfer support, material characterization and routine QA of crude oil and petroleum products. It also serves as a comparative or legacy method where hydrometer-based results are required or historically used.
Related standards
Standards commonly used alongside or as alternatives to ISO 3675 include ISO 12185 (oscillating U-tube density meter method) and recognized industry test methods such as ASTM D1298 (hydrometer method) and ASTM D4052 (digital/oscillating U-tube density meters). These provide complementary laboratory methods (hydrometer vs. density meter) and are referenced when selecting instrumentation, accuracy levels and automation.
Keywords
density; mass density; hydrometer; hydrometer method; crude petroleum; petroleum products; specific gravity; API gravity; 15 °C; laboratory determination; Reid vapour pressure; meniscus correction.
FAQ
Q: What is this standard?
A: ISO 3675:1998 is an International Standard that defines a laboratory hydrometer method to determine the density (and related gravity measures) of crude petroleum and liquid petroleum products, edition 3 published June 1998.
Q: What does it cover?
A: It covers the procedure, apparatus (glass hydrometer), sample conditioning, temperature control (reporting at 15 °C), corrections (meniscus and temperature), and limitations for viscous or high‑vapour‑pressure samples.
Q: Who typically uses it?
A: Chemical and petroleum testing laboratories, refinery QC, inspection and trading companies, and other organisations involved in custody transfer, product specification and quality control of petroleum liquids.
Q: Is it current or superseded?
A: ISO 3675:1998 is published and remains the ISO entry for this hydrometer method, but ISO’s records indicate the document stage as reviewed periodically and that a Committee Draft (ISO/CD 3675) for revision has been developed to update the method. Users should check ISO or their national standards body for the latest status before formal adoption.
Q: Is it part of a series?
A: It sits within the family of density-measurement standards for petroleum products (same ICS 75.080) and is commonly considered alongside oscillating U‑tube density meter standards (ISO 12185) and ASTM equivalents (D1298, D4052) when selecting methods or instruments.
Q: What are the key keywords?
A: density, hydrometer, hydrometer method, crude petroleum, petroleum products, specific gravity, API gravity, 15 °C, meniscus correction, Reid vapour pressure.