MT/T 716-2019 PDF English
US$370.00 · In stock · Download in 9 secondsMT/T 716-2019: Technical delivery requirements of steel wire ropes for coal mine hoisting Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid MT/T 716: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| MT/T 716-2019 | English | 370 |
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Technical delivery requirements of steel wire ropes for coal mine hoisting
| Valid |
| MT 716-2005 | English | 639 |
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Delivery requirements of wire ropes for mine hoisting
| Obsolete |
| MT 716-1997 | English | 519 |
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Delivery requirements of wire ropes for mine hoisting
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MT/T 716-2019: Technical delivery requirements of steel wire ropes for coal mine hoisting---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/MTT716-2019
MT
NATIONAL COAL INDUSTRY OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing MT/T 716-2005
Technical delivery requirements of steel wire ropes for coal
mine hoisting
Issued on. DECEMBER 29, 2018
Implemented on. JULY 01, 2019
Issued by. State Coal Mine Safety Supervision Bureau
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Wire rope material... 6
4 Requirements... 7
5 Inspection and testing... 20
6 Inspection rules... 24
7 Packaging, marking, quality certificates and safety signs... 26
Annex A (normative) Wire rope twist quality and surface quality... 27
1 Scope
This document specifies the requirements for acceptance, pre-hanging inspection,
inspection and testing, inspection rules, packaging, marking, quality certificates and
safety signs, etc. of steel wire ropes for coal mine hoisting.
Steel wire ropes for coal mine hoisting include. shaft hoisting wire ropes, inclined shaft
hoisting wire ropes, hanging hoist wire ropes, inclined wire ropes for transporting
personnel, traction belt conveyor wire ropes and tilted stepless rope winch wire ropes
and wire ropes for overhead passenger installations.
This Standard applies to various round strand wire ropes, special-shaped strand wire
ropes and compacted strand wire ropes for coal mine hoisting.
This Standard does not apply to balancing flat wire ropes and sealed wire ropes.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 228.1, Metallic materials -- Tensile testing -- Part 1.Method of test at room
temperature
GB/T 238, Metallic materials -- Wire -- Reverse bend test
GB/T 239.1, Metallic materials -- Wire -- Part 1.Simple torsion test
GB/T 1839, Test method for gravimetric determination of the mass per unit area of
galvanized coatings on steel products
GB/T 2104, Steel wire ropes -- Packing, marking and certificate -- General
requirements
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 8358, Steel wire ropes -- Determination of breaking force
GB/T 8706, Steel wire ropes -- Vocabulary, designation and classification
3 Wire rope material
3.1 Steel wire for rope making
The steel wire used for rope making shall comply with the requirements for important
purpose steel wire in GB/T 8919.Compacted strand wire rope wires shall comply with
the requirements for important purpose steel wires in YB/T 5343.
3.2 Rope core
3.3 Grease
Unless otherwise required by the purchaser, the surface of the wire rope shall be evenly
and continuously coated with anti-rust lubricating grease. When the purchaser requires
the steel wire rope to have friction-increasing performance, the steel wire rope shall be
coated with friction-increasing grease and there shall be no leakage.
4 Requirements
4.1 Basic requirements
4.1.1 Wire ropes shall have mining product safety signs.
4.1.2 Wire ropes shall have quality certificates. Among them, the requirements for steel
wire ropes shall comply with the implementation standards and requirements for safety
signs of mining products.
4.2 Requirements for wire ropes
4.2.1 Diameter
4.2.1.1 Nominal diameter
The nominal diameter shall comply with the requirements of GB/T 8918 and YB/T
5359, otherwise it shall be agreed upon by both parties. The nominal diameter shall be
indicated on the wire rope quality certificate.
4.2.1.2 Diameter deviation and out-of-roundness
Diameter deviation and out-of-roundness are shown in Table 1.
4.2.2 Length
4.2.2.1 Nominal length
It shall be agreed between the supplier and the purchaser and specified in the order
contract. All specimens shall be included in the order length.
4.2.3 Weight
4.2.3.1 Reference weight
In kg/100 m as the unit, it shall comply with the provisions of GB/T 8918 and YB/T
5359.Otherwise, it shall be agreed upon by the supplier and the purchaser and specified
in the contract.
4.2.4 Surface quality and twist quality
They shall comply with the provisions of Annex A.
4.2.5 Not loose
The wire rope shall not be loose (except for multi-layer strands, four-strand fan strands
and braided wire ropes).
4.2.6 Elongation
Permanent elongation in use shall be mutually agreed upon.
4.2.7 Nominal tensile strength and breaking force
4.3.3 Tensile strength and breaking force of steel wire
4.3.3.1 Nominal tensile strength
The nominal tensile strength of the steel wire shall comply with the provisions of Table
2 and shall be stated on the steel wire rope quality certificate. The values in Table 2 are
the lower limits of tensile strength. The upper limit is equal to the lower limit plus the
strength tolerance specified in Table 4.
4.3.3.2 Strength tolerance
The strength tolerance shall comply with the requirements in Table 4.
4.3.4 Repeated bending
The number of repeated bending times for steel wires with a diameter greater than or
equal to 0.50 mm shall comply with the requirements in Table 5.
5 Inspection and testing
5.1 Inspection and testing of wire ropes
5.1.1 Measurement of diameter
Wire rope diameter shall be measured with a vernier caliper with wide jaws. The
minimum width of its jaws shall be sufficient to span two adjacent strands. The
minimum graduation value of the measuring instrument shall not be less than ±0.02
mm.
5.1.3 Measurement of weight
Measure the total weight of the wire rope (including spool, hook and packaging material)
in kg. Subtract the weight of the reel, chain hook and packaging material from the total
weight and divide it by the actual measured length of the wire rope (in hundreds of
meters). The resulting quotient is the actual unit weight of the wire rope, expressed in
kg/100 m.
5.2.2 Tensile test
Carry out according to the method specified in GB/T 228.1.
5.2.3 Repeated bending test
Carry out according to the method specified in GB/T 238.
5.2.4 Torsion test
Carry out according to the method specified in GB/T 239.1.
5.2.5 Zinc layer weight test
Carry out according to the method specified in GB/T 1839.
5.2.6 Eligibility conditions
5.2.6.1 Method 1
6 Inspection rules
6.1 General
6.1.1 Each wire rope shall undergo acceptance inspection and inspection before hanging.
6.1.2 Acceptance inspection and pre-hanging inspection shall be proposed and sampled
by the user.
6.1.3 Acceptance inspection and pre-hanging inspection shall be carried out by qualified
inspection organizations authorized by the department responsible for supervision and
management of production safety.
6.2 Sampling method and sampling quantity
6.2.3 Zinc layer weight test
The test quantity is 10% of the total number of steel wires of the same nominal diameter
in the wire rope (selected from the specified number of strands). Round to an integer
according to GB/T 8170.
6.3 Rules for judgement
6.3.1 Method 1
6.3.2 Method 2
6.3.2.1 Round strand wire rope and special-shaped strand wire rope
If the breaking tension of the steel wire rope is qualified and the split wire test meets
the qualification conditions, the steel wire rope will be judged to be qualified. If the
breaking tension of the wire rope fails or the split wire test fails to meet the qualification
conditions, the wire rope will be judged to be unqualified.
7 Packaging, marking, quality certificates and safety signs
The packaging, marking, quality certificates and safety signs of steel wire ropes shall
comply with the regulations of GB/T 2104 and AQ 1043.
MT/T 716-2019
MT
NATIONAL COAL INDUSTRY OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing MT/T 716-2005
Technical delivery requirements of steel wire ropes for coal
mine hoisting
Issued on. DECEMBER 29, 2018
Implemented on. JULY 01, 2019
Issued by. State Coal Mine Safety Supervision Bureau
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Wire rope material... 6
4 Requirements... 7
5 Inspection and testing... 20
6 Inspection rules... 24
7 Packaging, marking, quality certificates and safety signs... 26
Annex A (normative) Wire rope twist quality and surface quality... 27
1 Scope
This document specifies the requirements for acceptance, pre-hanging inspection,
inspection and testing, inspection rules, packaging, marking, quality certificates and
safety signs, etc. of steel wire ropes for coal mine hoisting.
Steel wire ropes for coal mine hoisting include. shaft hoisting wire ropes, inclined shaft
hoisting wire ropes, hanging hoist wire ropes, inclined wire ropes for transporting
personnel, traction belt conveyor wire ropes and tilted stepless rope winch wire ropes
and wire ropes for overhead passenger installations.
This Standard applies to various round strand wire ropes, special-shaped strand wire
ropes and compacted strand wire ropes for coal mine hoisting.
This Standard does not apply to balancing flat wire ropes and sealed wire ropes.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 228.1, Metallic materials -- Tensile testing -- Part 1.Method of test at room
temperature
GB/T 238, Metallic materials -- Wire -- Reverse bend test
GB/T 239.1, Metallic materials -- Wire -- Part 1.Simple torsion test
GB/T 1839, Test method for gravimetric determination of the mass per unit area of
galvanized coatings on steel products
GB/T 2104, Steel wire ropes -- Packing, marking and certificate -- General
requirements
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 8358, Steel wire ropes -- Determination of breaking force
GB/T 8706, Steel wire ropes -- Vocabulary, designation and classification
3 Wire rope material
3.1 Steel wire for rope making
The steel wire used for rope making shall comply with the requirements for important
purpose steel wire in GB/T 8919.Compacted strand wire rope wires shall comply with
the requirements for important purpose steel wires in YB/T 5343.
3.2 Rope core
3.3 Grease
Unless otherwise required by the purchaser, the surface of the wire rope shall be evenly
and continuously coated with anti-rust lubricating grease. When the purchaser requires
the steel wire rope to have friction-increasing performance, the steel wire rope shall be
coated with friction-increasing grease and there shall be no leakage.
4 Requirements
4.1 Basic requirements
4.1.1 Wire ropes shall have mining product safety signs.
4.1.2 Wire ropes shall have quality certificates. Among them, the requirements for steel
wire ropes shall comply with the implementation standards and requirements for safety
signs of mining products.
4.2 Requirements for wire ropes
4.2.1 Diameter
4.2.1.1 Nominal diameter
The nominal diameter shall comply with the requirements of GB/T 8918 and YB/T
5359, otherwise it shall be agreed upon by both parties. The nominal diameter shall be
indicated on the wire rope quality certificate.
4.2.1.2 Diameter deviation and out-of-roundness
Diameter deviation and out-of-roundness are shown in Table 1.
4.2.2 Length
4.2.2.1 Nominal length
It shall be agreed between the supplier and the purchaser and specified in the order
contract. All specimens shall be included in the order length.
4.2.3 Weight
4.2.3.1 Reference weight
In kg/100 m as the unit, it shall comply with the provisions of GB/T 8918 and YB/T
5359.Otherwise, it shall be agreed upon by the supplier and the purchaser and specified
in the contract.
4.2.4 Surface quality and twist quality
They shall comply with the provisions of Annex A.
4.2.5 Not loose
The wire rope shall not be loose (except for multi-layer strands, four-strand fan strands
and braided wire ropes).
4.2.6 Elongation
Permanent elongation in use shall be mutually agreed upon.
4.2.7 Nominal tensile strength and breaking force
4.3.3 Tensile strength and breaking force of steel wire
4.3.3.1 Nominal tensile strength
The nominal tensile strength of the steel wire shall comply with the provisions of Table
2 and shall be stated on the steel wire rope quality certificate. The values in Table 2 are
the lower limits of tensile strength. The upper limit is equal to the lower limit plus the
strength tolerance specified in Table 4.
4.3.3.2 Strength tolerance
The strength tolerance shall comply with the requirements in Table 4.
4.3.4 Repeated bending
The number of repeated bending times for steel wires with a diameter greater than or
equal to 0.50 mm shall comply with the requirements in Table 5.
5 Inspection and testing
5.1 Inspection and testing of wire ropes
5.1.1 Measurement of diameter
Wire rope diameter shall be measured with a vernier caliper with wide jaws. The
minimum width of its jaws shall be sufficient to span two adjacent strands. The
minimum graduation value of the measuring instrument shall not be less than ±0.02
mm.
5.1.3 Measurement of weight
Measure the total weight of the wire rope (including spool, hook and packaging material)
in kg. Subtract the weight of the reel, chain hook and packaging material from the total
weight and divide it by the actual measured length of the wire rope (in hundreds of
meters). The resulting quotient is the actual unit weight of the wire rope, expressed in
kg/100 m.
5.2.2 Tensile test
Carry out according to the method specified in GB/T 228.1.
5.2.3 Repeated bending test
Carry out according to the method specified in GB/T 238.
5.2.4 Torsion test
Carry out according to the method specified in GB/T 239.1.
5.2.5 Zinc layer weight test
Carry out according to the method specified in GB/T 1839.
5.2.6 Eligibility conditions
5.2.6.1 Method 1
6 Inspection rules
6.1 General
6.1.1 Each wire rope shall undergo acceptance inspection and inspection before hanging.
6.1.2 Acceptance inspection and pre-hanging inspection shall be proposed and sampled
by the user.
6.1.3 Acceptance inspection and pre-hanging inspection shall be carried out by qualified
inspection organizations authorized by the department responsible for supervision and
management of production safety.
6.2 Sampling method and sampling quantity
6.2.3 Zinc layer weight test
The test quantity is 10% of the total number of steel wires of the same nominal diameter
in the wire rope (selected from the specified number of strands). Round to an integer
according to GB/T 8170.
6.3 Rules for judgement
6.3.1 Method 1
6.3.2 Method 2
6.3.2.1 Round strand wire rope and special-shaped strand wire rope
If the breaking tension of the steel wire rope is qualified and the split wire test meets
the qualification conditions, the steel wire rope will be judged to be qualified. If the
breaking tension of the wire rope fails or the split wire test fails to meet the qualification
conditions, the wire rope will be judged to be unqualified.
7 Packaging, marking, quality certificates and safety signs
The packaging, marking, quality certificates and safety signs of steel wire ropes shall
comply with the regulations of GB/T 2104 and AQ 1043.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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