GB 11715-1989 (English Version)

Standard No.: GB 11715-1989
Language: Chinese, Available in English version
Release Date: 1989
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB 11715-1989

Scope: This standard specifies the classification, technical conditions, test methods and inspection rules of oil tank cleaning machines (hereinafter referred to as tank cleaning machines) using crude oil (or seawater) as the medium. This standard applies to tank cleaning machines driven by turbines used in crude oil tank cleaning systems of oil tankers. Tank cleaning machines used in other tanks and cabinets for storing and transporting crude oil can also refer to this standard.

Introduction

Analysis of the key points of the standard

Model classification	Working pressure (MPa)	Effective range (m)	Typical application scenarios
Deck fixed type	0.6-1.2	26.5-37	Large crude oil carrier
Submersible fixed type	0.6-1.2	8-28	Deep cleaning of oil tank inner wall
Portable	0.6-1.2	18-36	Local repair and maintenance work

Key technology evolution analysis

Compared with the previous documents of the International Maritime Organization (IMO), this standard has breakthroughs in temperature adaptability (≤90℃ retention stability) and structural design (slope 1/50 drainage base), but there is still room for expansion in the mixed cleaning dimension parameters (oil-water switching continuity.

Implementation recommendations

The effective range detection needs to be controlled within lateral wind speed ≤1m/s, longitudinal wind speed ≤3m/s (Clause 5.1.2)
The sealing test includes double verification of 1.35 times the withstand pressure (5.3.3.3) and 1.25 times the regulated voltage (5.3.3.2)
The algorithm validity of the programmed tank cleaning machine must include 14 combined operation modes of variable surface capability

Selection and application methodology

Classic case matching table:
When the environmental salt spray level is ≥C4, node-type seals/zinc alloy nozzles are preferred; and under the 30,000-ton tank cleaning efficiency requirement, the TD32JC model can achieve an enhanced mean of ±5% linear error at 97% coverage.

Industry application extension

Although mainly aimed at oil tankers, the accompanying specifications of this standard (Table 4-6 Material Combinatorics) are also applicable to the matching improvement of eddy current injection and washing systems in strategic petroleum reserve equipment and LNG tank areas.

GB 11715-1989 history

1989 GB 11715-1989 Crude oil tank washing machine