GB/T 31971.2-2025 English PDF

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GB/T 31971.2-2025	RFQ	ASK	3 days	Ships and marine technology - Marine environment protection: performance testing of oil skimmers - Part 2: Light and medium viscosity oil	Valid
GB/T 31971.2-2015	294	Add to Cart	3 days	Ships and marine technology -- Marine environmental protection: Performance testing of oil skimmers -- Part 2: Static water conditions	Valid

Basic data

Standard ID: GB/T 31971.2-2025 (GB/T31971.2-2025)
Description (Translated English): Ships and marine technology - Marine environment protection: performance testing of oil skimmers - Part 2: Light and medium viscosity oil
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 31971.2-2015

GB/T 31971.2-2015: Ships and marine technology -- Marine environmental protection: Performance testing of oil skimmers -- Part 2: Static water conditions

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Ships and marine technology - Marine environment protection. performance testing skimmers - Part 2. Static water conditions) ICS 13.020.99; 47.020.99 U47 National Standards of People's Republic of China Ships and marine technology - Marine environment protection. skimmers Performance testing - Part 2. Static water conditions Shipsandmarinetechnology-Marineenvironmentalprotection. Performance testingofoilskimmers-Part 2. Staticwaterconditions (ISO 21072-2.2009, IDT) Issued on. 2015-09-11 2016-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 31971 "Ships and marine technology - Marine environment protection. performance testing skimmers" includes the following three parts. --- Part 1. dynamic water conditions; --- Part 2. Static water conditions; --- Part 3. High viscosity oil. This section GB/T Part of 231,971. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with ISO 21072-2.2009 "Ships and marine technology - Marine environment protection. performance test skimmers Part test 2. Static water conditions "(in English). Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 21478-2008 Ships and marine technology - Marine environmental protection to oil spill terminology (ISO 16165. 2001, IDT) This part is proposed by China Shipbuilding Industry Corporation. This part of the National Marine Machinery Standardization Technical Committee (SAC/TC137) centralized. This section drafted by. China Shipbuilding Industry Corporation seventh ○ four Institute. The main drafters of this section. Pu Chun Yip, Zhang Haiyan, Deng Lijuan. Ships and marine technology - Marine environment protection. skimmers Performance testing - Part 2. Static water conditions

1 Scope

This section GB/T 31971 specifies the skimmers to quantitatively determine the performance data in the static water conditions of the process, so that end users can Objective enough to judge, compare and evaluate different types of skimming device design and performance. This method is suitable for testing in the sink and the provisions of the oil Control features and slick feature requests. This section applies to the size of the device in the test tank size to limit the scope of the various types of skimmers. Under controlled conditions, this test procedure Were tested device and one or more oil provides a full range of test results. When using these test results are used to predict the actual skimmer Performance when working conditions need to be cautious. For dedicated/embedded systems, test procedures described in this section apply only to the same type of skimming equipment, but not for the entire skimming Oil system.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. ISO 16165 Ships and marine technology - Marine environmental protection spill handling related terms (Shipsand marine technology-Marineenvironmentprotection-Terminologyrelatingtooilspilresponse)

3 Terms and Definitions

ISO 16165 as well as the provisions of the following terms and definitions apply to this document. 3.1 Data collection session datacolectionperiod In the steady state period, and to determine the performance of the data acquisition period recovery of the liquid. [GB 31971.1-2015, Definition 3.1] 3.2 The residue debris Interference spill control operation of the system solid or semi-solid material. [GB 31971.1-2015, the definition 3.2] 3.3 Emulsification factor emulsificationfactor; EF Since the skimming/aspiration process and emulsified into the oil in the water, but does not include the initial test liquid water. Note. with between 0 and 1, expressed as a decimal. [GB 31971.1-2015, the definition 3.3] 3.4 Liquid recovery rate fluidrecoveryrate; FRR The total volume of liquid recovered per unit of time. ......

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