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DL/T 680-2015 English PDF (DLT680-2015)

DL/T 680-2015 English PDF (DLT680-2015)

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DL/T 680-2015: Specification for electric power industry wear-resistant pipes

This standard specifies the classification, designation, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation of electric power industry wear-resistant pipes. This standard is applicable to the wear-resistant pipes conveying such materials as pulverized coal, coal ash (coal cinder), limestone powder, gypsum slurry, etc.; other pipes with wear-resistant requirements may refer to this standard.
ICS 27.100
N 17
Record No.: 50038-2015
INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
DL/T 680-2015
Replacing DL/T 680-1999
Specification for Electric Power Industry
Wear-resistant Pipes
ISSUED ON: APRIL 2, 2015
IMPLEMENTED ON: SEPTEMBER 1, 2015
Issued by National Energy Administration
Contents
Foreword ... I
Introduction ... III
1 Scope ... 1
2 Normative References ... 1
3 Terms and Definitions ... 3
4 Classification of Wear-resistant Pipes ... 4
5 Technical Requirements ... 6
6 Test Methods ... 11
7 Inspection Rules ... 13
8 Marking, Packaging, Storage and Transportation ... 14
Appendix A (Informative) Operating Characteristic of Wear-resistant Pipe ... 15 Specification for Electric Power Industry Wear-resistant Pipes
1 Scope
This standard specifies the classification, designation, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation of electric power industry wear-resistant pipes.
This standard is applicable to the wear-resistant pipes conveying such materials as pulverized coal, coal ash (coal cinder), limestone powder, gypsum slurry, etc.; other pipes with wear-resistant requirements may refer to this standard.
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies. For undated references, the latest edition (including all the amendments) of the normative document applies.
GB/T 223.4 Alloyed Steel - Determination of Manganese Content - Potentiometric or Visual Titration Method
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric Method for the Determination of
Copper Content
GB/T 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon
Content
GB/T 223.67 Iron Steel and Alloy - Determination of Sulfur Content - Methylene Blue Spectrophotometric Method
GB/T 223.69 Iron, Steel and Alloy - Determination of Carbon Contents -
Gas-volumetric Method after Combustion in the Pipe Furnace
12
Quality of the inner and outer surfaces of wear-resistant pipe is inspected visually or with corresponding measuring tools.
6.2 Geometric dimension
Geometric dimension is measured with corresponding measuring tools like caliper, steel tape, template, thickness gauge, etc.
6.3 Pressure resistance capability
Test of pressure resistance capability is carried out according to the method specified in 5.4 of this standard.
6.4 Chemical component analysis of metal
Chemical composition analysis test of metal is carried out according to the methods specified in GB/T 223.4, GB/T 223.5, GB/T 223.11, GB/T 223.18, GB/T 223.23, GB/T 223.26, GB/T 223.59, GB/T 223.60, GB/T 223.67, GB/T 223.69, GB/T 223.71, GB/T 223.72, GB/T 4336, GB/T 14203 and GB/T 20066.
6.5 Mechanical performance of metal
6.5.1 Rockwell hardness test of metal is carried out according to the method specified in GB/T 230.1; product hardness detection may be carried out with Leeb hardness tester according to the method specified in GB/T 17394.1, GB/T 17394.4 or JB/T 9378. 6.5.2 Impact test of metal is carried out according to the method specified in GB/T 229. 6.6 Performance of ceramic lining material
6.6.1 Volume density test is carried out according to the method specified in GB/T 2997. 6.6.2 Vickers hardness test is carried out according to the method specified in GB/T 16534; Rockwell hardness test is carried out according to GB/T 27979; Mohs hardness test is carried out according to the method specified in EN 101.
6.6.3 Wear resistance test is carried out according to the method specified in DL/T 902. 6.6.4 Performance test of single ceramic lining (block) is carried out according to the method specified in GB/T 27979 or JC/T 848.1.
6.7 Performance of rubber lining material
6.7.1 Tests of tensile strength and elongation at break are carried out according to the methods specified in GB/T 528.
6.7.2 Shore hardness test is carried out according to the method specified in GB/T 531.1. 6.7.3 Wear resistance test is carried out according to the method specified in GB/T 1689. 6.7.4 Hot air aging performance test is carried out according to the method specified in GB/T 3512.
6.8 Performance of high-temperature wear-resistant lining material
6.8.1 Volume density test is carried out according to the method specified in GB/T 2997. 6.8.2 Breaking strength and compressive strength tests are carried out according to the methods specified in YB/T 5201.
6.8.3 Wear resistance test is carried out according to the method specified in GB/T 18301. 6.9 Performance of cast stone lining material
6.9.1 Volume density test is carried out according to the method specified in GB/T 2997. 6.9.2 Wear resistance test is carried out according to the method specified in JC/T 260. 6.9.3 Bending strength test is carried out according to the method specified in JC/T 263. 6.9.4 Mohs hardness test is carried out according to the method specified in EN 101. 6.10 Performance of silicon carbide lining material
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6.10.1 Chemical component test is carried out according to the method specified in GB/T 3045.
6.10.2 Volume density test is carried out according to the method specified in GB/T 2997. 6.10.3 Breaking strength test is carried out according to the method specified in GB/T 3001. 6.10.4 Bending strength test is carried out according to the method specified in GB/T 6569. 6.10.5 Wear resistance test is carried out according to the method specified in GB/T 18301. 6.10.6 Mohs hardness test is carried out according to the method specified in EN 101. 7 Inspection Rules
7.1 Delivery inspection
7.1.1 Quality of the inner and outer surfaces, dimensional deviation, chemical component and inner pipe wall hardness of metallic wear-resistant pipe and wear resistant white cast iron bi-metallic composite wear-resistant pipe.
7.1.2 Quality of the inner and outer surfaces, dimensional deviation, chemical component and inner pipe wall hardness of inner wall hardening alloy steel wear-resistant pipe and bi-metallic inner pipe hardening alloy steel composite wear-resistant pipe. 7.1.3 Quality of the inner and outer surfaces, dimensional deviation, chemical component and inner pipe wall hardness of surfacing composite wear-resistant pipe. 7.1.4 Quality of the outer and inner surfaces, dimensional deviation and lining ceramic hardness of ceramic composite wear-resistant pipe.
7.1.5 Quality of the inner and outer surfaces, dimensional deviation and lining rubber hardness of rubber composite wear-resistant pipe.
7.1.6 Quality of the inner and outer surfaces, dimensional deviation and volume density of lining material of high-temperature wear-resistant lining composite pipe. 7.1.7 Quality of the inner and outer surfaces, dimensional deviation and lining cast stone hardness of cast stone composite wear-resistant pipe.
7.1.8 Quality of the inner and outer surfaces, dimensional deviation and lining silicon carbide hardness of silicon carbide composite wear-resistant pipe.
7.1.9 The wear-resistant pipes can only be delivered after passing the inspection by the quality inspection department of manufacturer and being issued with conformity certificate and quality certificate.
7.2 Acceptance inspection
While accepting the wear-resistant pipe, the user shall carry out acceptance inspection on the quality of such pipe item-by item according to relevant requirement of this standard. 7.3 Type inspection
7.3.1 Type inspection items are the whole items in this standard.
Type inspection shall be carried out under one of the following conditions: a) Upon trial production of new products;
b) Where the product design, production process or raw material has significant change;
c) Where the production is resumed after shut down for more than one year; d) Where there is relatively large difference between the delivery inspection result and 14
the last type inspection result;
e) Where type inspection is required by the state quality and technology supervision and inspection organization.
7.3.2 Type inspection samples shall be randomly taken from products in finished product warehouse passing delivery inspection and the sampling number should not be less than 3 pieces; if any inspection result is rejected, it is allowed to sample doubly from the same batch of products for re-inspection; if it is still rejected, this inspection items is judged as rejected. 8 Marking, Packaging, Storage and Transportation
8.1 Marking and conformity certificate
8.1.1 Each wear-resistant pipe shall be marked with:
a) Name and trademark of manufacturer;
b) Name and No. of product;
c) Product specification;
d) Medium flow direction;
e) Production date;
f) Drop resistance warning mark.
8.1.2 Each batch of wear-resistant pipes shall be accompanied with product instructions and product certificate (quality certificate) for delivery; the contents on product certificate are: a) Product name;
b) Specification and quantity of product;
c) No. and name of this standard adopted by the product;
d) Designation of wear-resistant pipe;
e) Sales contract No.;
f) Product quality inspection result as well as seals of the inspector and inspection department;
g) Name and address of manufacturer.
8.2 Packaging, storage and transportation
8.2.1 Outer surface of wear-resistant pipe shall be subject to anti-corrosion treatment. 8.2.2 Wear-resistant pipes should be bundled and packed properly with straw mat, straw rope, straw bag, wooden case, tray, frame, steel hoop or elastic material. 8.2.3 The storage yard of wear-resistant pipes should be flat, smooth, dry and ventilated, the pipes should be arranged neatly and be avoided from rustiness, bump, deformation and damage; both ends of pipeline should be sealed where necessary.
8.2.4 During the loading, unloading, lifting, transportation, installation and overhaul processes, wear-resistant pipes shall be handled gently and shall not be subject to severe collision, toss, drop and knock.

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