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GB/T 3220-2011 (GB/T3220-2011)

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GB/T 3220-2011: PDF in English (GBT 3220-2011)
GB/T 3220-2011
ICS 53.020.30
A 85
Replacing GB/T 3220-1982
Freight Container Spreader
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Classification, Model and Dimension ... 5
5 Technical Requirements ... 7
6 Test Methods ... 12
7 Inspection Rules ... 13
8 Marking and Transportation ... 15
Freight Container Spreader
1 Scope
This Standard specifies the classification, model, dimension, technical requirements,
test methods, inspection rules, marking and transportation of the freight container
This Standard is applicable to fixed and telescopic single freight container spreaders.
Other types of freight container spreaders (hereinafter referred to as spreader) can be
used as a reference.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 985.1 Recommended Joint Preparation for Gas Welding, Manual Metal Arc
GB/T 985.2 Recommended Joint Preparation for Submerged Arc Welding
GB/T 1228 High Strength Bolts with Large Hexagon Head for Steel Structures
GB/T 1229 High Strength Large Hexagon Nuts for Steel Structures
GB/T 1230 High Strength Plain Washers for Steel Structures
GB/T 1413 Series 1 Freight Containers - Classification, Dimensions and Ratings
GB/T 1591 High Strength Low Alloy Structural Steels
GB 2893 Safety Colors
GB 2894 Safety Signs and Guideline for Use
GB/T 3323 Radiographic Examination of Fusion Welded Joints in Metallic
GB/T 3766 Hydraulic Fluid Power - General Rules Relating to Systems
GB/T 3811 Design Rules for Cranes
GB 4208 Degree of Protection Provided by Enclosure (IP Code)
GB/T 5117 Carbon Steel Covered Electrodes
GB/T 5118 Low Alloy Steel Covered Electrodes
GB/T 6067 Safety Rules for Lifting Appliances
GB 8923 Rust Grades and Preparation Grades of Steel Surfaces before
GB/T 11345 Method for the Manual Ultrasonic Testing and Classification of Testing
Results for Steel Welds
GB/T 14957 Steel Wires for Melt Welding
JB/T 7949 Weld Outer Dimensions for Steel Construction
CB/T 3123 Quality Specification of Flame Cutting Plane for Marine Rolling Steel
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
3.1 Freight container spreader
A lifting tool connecting with the above and the below by a hoisting machine and a
lifting device. The lifting tool has a structure suitable for a freight container box body,
and is connected with a corner piece of the box body through a twist lock at a corner
portion to perform operations of the freight container lifting.
4 Classification, Model and Dimension
4.1 Classification
The basic types of freight container spreaders are as follows:
a) Fixed container spreader: no special telescopic power unit, the geometric size of
the freight container spreader remains unchanged;
b) Telescopic freight container spreader: equipped with a mechanical or hydraulic
telescopic mechanism, which can perform telescopic adjustment within the
relevant range of 6.10m (20ft) and greater than 6.10m (20ft).
4.2 Model
5.2 Materials
5.2.1 The material of main parts (twist lock, ejector rod) shall have the certificate of
conformity from the material manufacturer.
5.2.2 The yield limit of the material selected for the load-bearing structural members of
the freight container spreader shall be no lower than 235 MPa specified in GB/T 1591.
The steel should be de-rusted before use.
5.2.3 The twist lock shall be made of high-quality steel with a yield limit of no less than
450 MPa.
5.3 Structural parts
5.3.1 The cutting surface that affects the appearance quality and product performance
shall be no lower than the Level-2 specified in CB/T 3123.
5.3.2 Welding rods, wires and fluxes shall comply with the provisions of GB/T 5117,
GB/T 5118; and shall be matched with the material of the structural parts to be welded.
5.3.3 The shape of the weld bevel shall comply with the provisions of GB/T 985.1 and
GB/T 985.2.
5.3.4 The quality of the butt welds of the stressed structural parts is no lower than the
Level-I specified in GB/T 11345 and the Level-II specified in GB/T 3323.
5.3.5 The shape and dimensions of the welded joints and welds of the components
shall comply with the provisions of GB/T 985.1 and JB/T 7949. All welds shall be free
of missing welds, burn-throughs, cracks, unwelded penetrations, undercuts, slags, and
the like defects that affect performance and appearance quality.
5.3.6 After welding, the bending and arching of the frame shall not exceed 1.5 ‰ of
the center distance of the spreader in the length and width directions.
5.3.7 High-strength bolts, nuts, and washers used to connect metal structural parts
shall meet the requirements of GB/T 1228 ~ 1230.
5.3.8 The telescopic boom or beam of the telescopic spreader body shall be provided
with lifting ears for loading and unloading bulk cargo.
5.4 Mechanism
5.4.1 Twist lock device Twist lock device can be divided into manual, semi-automatic and power twist
locks. The telescopic device of the spreader is mainly composed of a telescopic beam,
a power device and a transmission device. The telescopic performance of the spreader shall be smooth and free of
obstruction. The sliding surface between the telescopic beam and the fixed beam shall be
equipped with abrasion reducing linings or rollers. The coefficient of additional frictional resistance of the telescope should be
1.2~1.5. Under the action of rated load, the deflection value, YL, of the telescopic beam
is no greater than Lc/700 (Lc is the effective working length of the cantilever). The chain for the telescopic device shall meet the design requirements and
provisions of GB/T 3811. Each chain shall be interchangeable, and an adjustable device shall be
installed at the joint between the telescopic chain and the structure. The safety factor of the chain shall be no lower than the safety factor of the
lifting chain specified in GB/T 6067.
5.4.4 Hydraulic system The hydraulic system shall conform to the provisions of GB/T 3766. Before
assembly of the hydraulic system, the joints, pipelines and channels shall be cleaned
without any dirt; after assembly, the system shall be cleaned and the cleaning oil shall
be drained completely. The main hydraulic components shall be accompanied by the certificate of
conformity of the manufacturer. The pipelines of the hydraulic system shall be shock-resistant, impact-resistant
and leak-free. The hydraulic system installed on the spreader shall adopt vibration reduction
measures. The filter element and hydraulic oil shall be inspected every 1000h of the
hydraulic system operation interval, and those that are not qualified shall be replaced. The installation of hydraulic oil pumps and motors shall be easy to install,
inspect and replace.
5.4.5 Electrical system
5.6.3 An eye-catching safety sign shall be painted on the end of the telescopic beam,
and the color of the safety sign shall comply with the provisions of GB 2893 and GB
5.7 Appearance quality and dimensions
5.7.1 The surface of all parts shall be flat, without obvious deformation and damage,
and the welds shall be uniform and beautiful.
5.7.2 The color of the paint shall be uniform, without smearing, paint leakage and
5.7.3 Each fastener shall be free of looseness and neglected loading, and the exposed
length of fasteners at the same location shall be the same.
5.7.4 The pipelines shall be arranged neatly and there should be no oil leakage.
5.7.5 The nameplates, performance tables, hoisting signs and function indicators shall
be complete.
6 Test Methods
6.1 Twist lock mechanism
Put the four lock heads of the spreader into the corner hole of the container so that the
spreader does not leave the box. Each time the twist lock mechanism moves, the four
lock heads are rotated 90° synchronously, and the unlocking and locking indicators are
displayed correctly, and the action is repeated. The continuous test is no less than 50
times, and there is no one mis-operation.
6.2 Guide plate device
Operate the movable guide plate, check that the flip angle and overall dimensions of
the guide plate shall meet the requirements of and
6.3 Telescopic mechanism
6.3.1 The telescopic position of the spreader shall meet the design requirements and
be positioned accurately.
6.3.2 The telescopic action shall be smooth and free, without looseness and abnormal
noise, and without blockage during movement.
6.3.3 The telescopic time shall meet the requirements in Table 3.
6.3.4 The continuous test of the telescopic motion shall be done at least 100 times and
7.1.1 The type inspection shall be performed in one of the following cases:
a) If there are major changes in structure, materials, processes, etc., which may
affect product performance;
b) A periodical inspection shall be carried out for five consecutive years of
production or producing 100 units in the same batch;
c) When the production is resumed after three years of shutdown;
d) When a national quality supervision agency requests a type inspection;
e) When the exit-factory inspection results are significantly different from the last
type inspection.
7.1.2 The type inspection shall be carried out in accordance with the following
provisions, and all inspection items shall be carried out on the same sample:
a) Confirm that the material, size of the forged, cast and machined parts, as well as
the quality of purchased shall meet the requirements of 5.2 and 5.3;
b) Visual examine the shape, paint, component composition, relative position, fit
state, connection state, tightening state, and lubrication state of the spreader,
which shall meet the corresponding requirements of 5.4, 5.6, and 5.7;
c) Inspect the quality of welds, which shall meet the relevant requirements of 5.3.4
and 5.3.5;
d) All tests in Clause 6 shall be carried out, which shall meet the corresponding
requirements in Clause 6.
7.2 Exit-factory inspection
7.2.1 Products shall not be shipped until they have passed the inspection by the
inspection department, and the inspection department shall issue a product certificate.
7.2.2 Each spreader shall be inspected for welding quality and structural reliability in
accordance with the requirements of 5.3.4, 5.3.5 and 5.3.6.
7.2.3 The reliability of the safety interlock shall be checked for each spreader in
accordance with the requirements of 5.5.
7.2.4 Each spreader shall be inspected in accordance with the requirements of 7.1.2.
7.3 Lot approval and sampling
For batch production, one set from each batch is selected for all tests specified in
(Above excerpt was released on 2020-03-31, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT3220-2011