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Electrical Conduit Flame-Retardancy Tester JLD-85112
This instrument is used to determine the flame‑retardant performance of electrical flame‑retardant conduits and fittings, in compliance with the requirements of Clause 6.10.1—“Self‑extinguishing test” for insulated electrical conduits—stipulated in JG 3050‑1998, “Insulated Electrical Conduits and Fittings for Building Applications.” The device features an automatic high‑voltage igniter, a refined design, and excellent resistance to atmospheric corrosion. It displays the elapsed time digitally, with fully automated test‑procedure control, offering convenient operation and reliable, stable performance.
The building doors and windows physical‑performance testing equipment builds upon existing models, incorporating the strengths of comparable products—particularly to meet the standard requirements for the three key physical performance characteristics of doors and windows. This product more effectively and accurately complies with the demands of new testing methods. Significant upgrades have been made to the specimen‑mounting system (the static pressure chamber): a new stainless‑steel material has been adopted for the main frame, and the nozzle‑placement mechanism is now automatically concealed, eliminating the need for manual adjustment. The clamping mechanism has also been further refined, boosting installation efficiency by more than threefold. In addition, to align with the evolving needs of modern testing laboratories, substantial efforts have been invested in redesigning the product’s appearance, resulting in a compact structure and user‑friendly operation. It is an essential piece of equipment for research institutions, quality‑inspection agencies, and manufacturing facilities conducting such tests. The device employs microcomputer‑based automated testing.
Building Material Combustibility Test Furnace, Building Material Combustion Test Chamber Tester
The building material flammability test furnace is used to assess the flammability of construction products by subjecting vertically mounted specimens to direct impingement from a small flame under standard combustion conditions. Under direct vertical flame impingement, it is employed to determine the combustion performance of building materials—specifically, to classify their fire‑resistance or flame‑retardant rating.
The non-combustibility test furnace for building materials employs microcomputer and thyristor technologies, with power regulation to control the furnace temperature. It features a dual-control system: operation can be managed either via the touch screen or through a computer, with seamless switching between the two modes. A single unit can be operated by multiple computers simultaneously, supporting concurrent online access from several workstations and enabling local area network sharing.
This device is used for electrical conduit with outer diameters of 16 mm, 20 mm, and 25 mm and a length of 500 mm. Without the use of bending aids, the conduit is bent to a 90° angle, after which its crush‑resistance performance is evaluated. The apparatus is lightweight, features a simple structure, and is easy to operate.
I. Product Overview This instrument is used for heat‑resistance testing of semi‑rigid and corrugated conduit, determining the required heat‑resistance rating of the tubing material and thereby assessing its heat‑resistance strength. It complies with the requirements of GB/T 14823.2 “Conduit for Electrical Installations—Special Requirements—Rigid Insulated Flat Conduit,” JG 3050 “Insulated Electrical Conduit and Fittings for Building Applications,” and ZBG 33008 “Corrugated Polyvinyl Chloride Plastic Wire Conduit,” among others. II. Main Technical Parameters: 1. Steel rod diameter: 6 mm 2. Load weights: 1 kg, 2 kg
JG3050-5 Rigid Conduit Inner Diameter Gauge for Electrical Conduits
Electrical conduit gauge set material: Steel. This gauge set refers to all gauges specified in “JG 3050-1998 Electrical Conduit” for measuring relevant dimensions of conduit. The set is applicable to round electrical conduits made of plastic insulating materials, used within buildings or structures to protect and secure the routing of wires or cables. It includes: Image 2 of “JG 3050-1998 Electrical Conduit”—maximum outer diameter gauge; Image 3—minimum outer diameter gauge; Image 4—minimum outer diameter gauge for semi-rigid and corrugated conduits; Image 5—minimum inner diameter gauge; Image 6—minimum inner diameter gauge; Image 11—threaded gauge; Image 12—minimum inner diameter gauge after bending for semi-rigid and corrugated conduits; and a total of 45 gauges for minimum inner diameter after bending of rigid conduits. Specifically: In Image 2, the maximum outer diameter gauges comprise seven pieces, with a manufacturing tolerance of +0.04 mm. Their dimensions are as follows: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 16.04, 20.04, 25.04, 32.04, 40.04, 50.04, and 63.04; and gauge diameters: 45, 45, 60, 70, 70, 85, and 100. In Image 3, the minimum outer diameter gauges also consist of seven pieces, with a manufacturing tolerance of −0.01 mm. Their dimensions are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 8, 9, 9, 10, 10, 12, and 12. In Image 4, the minimum outer diameter gauges for semi‑rigid and corrugated conduits comprise seven pieces, with a manufacturing tolerance of −0.01 mm. Their dimensions are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 24, 24, 32, 36, 36, 40, and 40. In Image 5, the minimum inner diameter gauges include seven pieces, with a manufacturing tolerance of −0.01 mm. Their external dimensions are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2; corresponding gauge sizes are 16, 20, 25, 32, 40, 50, and 63; and their diameters are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2. In Image 6, the threaded gauges comprise seven pieces, with a manufacturing tolerance of −0.005 mm.
Hard Pipe Bending Testing Machine JG3050-9
I. Product Overview This testing machine is designed for bending tests on insulating electrical conduit and similar materials, with a total bending angle of 180°. After the test, the specimen is inspected for cracks. It complies with standards including GB/T 14823.2 “Conduits for Electrical Installations—Special Requirements—Rigid Insulating Conduits,” JG/T 3050 “Insulating Electrical Conduits and Fittings for Building Applications,” and ZB G33008 “Corrugated Polyvinyl Chloride Plastic Wire Conduits.” The machine can perform all three types of conduit tests specified in the standards without requiring replacement of forming dies or bending rollers. With its convenient operation, intuitive interface, and reliable performance, it is increasingly widely used. II. Main Technical Parameters: 1. Nominal diameter of test conduit: 16, 20, 25 mm 2. Transverse radius of forming wheel: 48, 60, 75 mm 3. Radius of curvature of bending wheel: 84, 105, 131.25 mm 4. Groove radii of forming and bending wheels: 8.1, 10.1, 12.6 mm 5. Diameter of bending wheel grooves: 24, 30, 37.5 mm 6. Bending angle of the specimen: 180° 7. Overall dimensions (L × W × H): 300 × 300 × 600 mm 8. Weight: approximately 25 kg
Electrical conduit gauge set material: Steel. This gauge set refers to all gauges specified in “JG 3050-1998 Electrical Conduit” for measuring relevant dimensions of conduit tubing. The set is applicable to round electrical conduits made of plastic insulating materials, used within buildings or structures to protect and secure the routing of wires or cables. It includes: Image 2 of “JG 3050-1998 Electrical Conduit”—maximum outer diameter gauge; Image 3—minimum outer diameter gauge; Image 4—minimum outer diameter gauge for semi-rigid and corrugated conduits; Image 5—minimum inner diameter gauge; Image 6—minimum inner diameter gauge; Image 11—threaded gauge; Image 12—minimum inner diameter gauge after bending for semi-rigid and corrugated conduits; and a total of 45 gauges for minimum inner diameter after bending of rigid conduits. Specifically: In Image 2, the maximum outer diameter gauges comprise seven pieces, with a manufacturing tolerance of +0.04 mm. Their dimensions are as follows: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 16.04, 20.04, 25.04, 32.04, 40.04, 50.04, and 63.04; and gauge diameters: 45, 45, 60, 70, 70, 85, and 100. In Image 3, the minimum outer diameter gauges also consist of seven pieces, with a manufacturing tolerance of −0.01 mm. Their dimensions are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 8, 9, 9, 10, 10, 12, and 12. In Image 4, the minimum outer diameter gauges for semi‑rigid and corrugated conduits include seven pieces, with a manufacturing tolerance of −0.01 mm. Their dimensions are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 24, 24, 32, 36, 36, 40, and 40. In Image 5, the minimum inner diameter gauges comprise seven pieces, with a manufacturing tolerance of −0.01 mm. Their external dimensions are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2. Corresponding gauge sizes are: 16, 20, 25, 32, 40, 50, and 63; and their respective diameters are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2.
This device is used for electrical conduit with outer diameters of 16 mm, 20 mm, and 25 mm and a length of 500 mm. Without the use of bending aids, the conduit is bent to a 90° angle, after which its crush‑resistance performance is evaluated. The apparatus is lightweight, features a simple structure, and is easy to operate.
The flexibility testing apparatus for plastic corrugated ducts used in prestressed concrete bridges (hereinafter referred to as the “testing apparatus”) employs a plug gauge to assess the passage of these ducts—hereinafter referred to as “plastic corrugated ducts”—under a limited number of bending cycles, thereby characterizing their flexibility. It is suitable for conducting flexibility tests on plastic corrugated ducts employed in prestressed concrete bridges.
This device is used for electrical conduit with outer diameters of 16 mm, 20 mm, and 25 mm and a length of 500 mm. Without the use of bending aids, the conduit is bent to a 90° angle, after which its crush‑resistance performance is evaluated. The apparatus is lightweight, features a simple structure, and is easy to operate.
I. Product Overview This device complies with the requirements of JG/T 225-2020, “Metal Corrugated Pipes for Prestressed Concrete,” and is used to test the leakage‑resistance performance of metal corrugated pipes after bending. II. Main Technical Parameters 1. Curvature radius of round‑pipe supports: 30 times the nominal inner diameter of the pipe. 2. Curvature radius of flat‑pipe supports: 4,000 mm. 3. Optional inner diameters: 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 96, 102, 108, 114, 120, 126, and 132 mm, as well as flat‑pipe sizes.
I. Product Overview The metal bellows uniformly loaded clamp (for flat‑section bellows) is designed for radial stiffness testing of metal bellows with flat cross‑sections. It complies with the requirements specified in JG 225‑2020, “Metal Bellows for Prestressed Concrete.” II. Main Technical Parameters 1. Applicable flat‑section dimensions: 52×20, 58×22, 67×20, 75×20, 74×22, 90×22 (per the 2007 standard: 65×20, 78×20, 60×22, 76×22). 2. Connection thread: M12.
I. Product Overview This product complies with the requirements of JG 225-2007 “Metal Corrugated Pipes for Prestressed Concrete” and is used to determine the radial stiffness of metal corrugated pipes under concentrated loading. II. Main Technical Parameters 1. Round steel dimensions: φ10 × 150 mm 2. Connection thread: M12 3. Standard connector: φ18 mm, pin hole: 10 mm
I. Product Overview This instrument is used for marking during the determination of the longitudinal shrinkage rate of thermoplastic plastic pipes. The longitudinal shrinkage rate is an important indicator of the quality and performance of plastic pipe products, reflecting their stability in undergoing plastic deformation along the longitudinal axis under thermal influence. The product is manufactured in accordance with GB/T 6671-2001, “Determination of Longitudinal Shrinkage Rate of Thermoplastic Plastic Pipes.” II. Main Technical Parameters 1. Blade‑roller spacing: 100 mm ± 0.1 mm 2. Applicable pipe diameters: 6–380 mm 3. Net weight: 7 kg 4. Overall dimensions: 30 × 36 × 54 cm
Electrical conduit gauge set material: Steel. This gauge set refers to all gauges specified in “JG 3050-1998 Electrical Conduit” for measuring relevant dimensions of conduit tubing. The set is applicable to round electrical conduits made of plastic insulating materials, used within buildings or structures to protect and secure the routing of wires or cables. It includes: Image 2 of “JG 3050-1998 Electrical Conduit”—large outer diameter gauge; Image 3—small outer diameter gauge; Image 4—small outer diameter gauge for semi-rigid and corrugated conduits; Image 5—small inner diameter gauge; Image 6—threaded gauge; Image 11—threaded gauge; Image 12—small inner diameter gauge after bending for semi-rigid and corrugated conduits; and Image 13—minimum inner diameter gauge after bending for rigid conduits, totaling 45 items. Specifically: In Image 2, the large outer diameter gauges comprise seven pieces, with a manufacturing tolerance of +0.04 mm. Their dimensions are as follows: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 16.04, 20.04, 25.04, 32.04, 40.04, 50.04, and 63.04; and gauge diameters: 45, 45, 60, 70, 70, 85, and 100. In Image 3, the small outer diameter gauges also consist of seven pieces, with a manufacturing tolerance of −0.01 mm. Their sizes are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 8, 9, 9, 10, 10, 12, and 12. In Image 4, the minimum outer diameter gauges for semi‑rigid and corrugated conduits include seven pieces, with a manufacturing tolerance of −0.01 mm. Their sizes are: gauge sizes 16, 20, 25, 32, 40, 50, and 63; corresponding inner diameters: 15.7, 19.7, 24.6, 31.6, 39.6, 49.5, and 62.4; and standard gauge thicknesses: 24, 24, 32, 36, 36, 40, and 40. In Image 5, the minimum inner diameter gauges comprise seven pieces, with a manufacturing tolerance of −0.01 mm. Their external dimensions are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2; corresponding gauge sizes are: 16, 20, 25, 32, 40, 50, and 63; and their respective diameters are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2. In Image 6, the threaded gauges comprise seven pieces, with a manufacturing tolerance of −0.005 mm. Their external dimensions are: 45, 145, 60, 70, 70, 85, and 100; corresponding gauge sizes are: M16, M20, M25, M32, M40, M50, and M63.
I. Product Overview The ball‑pressure heat‑resistance test apparatus is used for conducting heat‑resistance tests on rigid conduits and their fittings. At a temperature of 60°C ± 2°C, a conical steel ball with a diameter of 5 mm is placed at the lower end of the specimen, and the assembly is held under a load of 20 N for 1 hour. After the specified duration, the diameter of the indentation is measured using a dial caliper. This equipment complies with the requirements of GB/T 14823.2 “Conduits for Electrical Installations—Special Requirements—Rigid Insulated Conduits,” JG 3050 “Insulated Electrical Conduits and Fittings for Building Applications,” GB 4706.1-2005 “Safety of Household and Similar Electrical Appliances—Part 1: General Requirements,” GB 20991-2008 “Plugs and Sockets for Household and Similar Use—Part 1: General Requirements,” and other relevant standards. II. Main Technical Parameters 1. Ball‑head pressure: 20 N 2. Ball‑head diameter: 5 mm 3. Test temperature: 60°C ± 2°C 4. Overall dimensions: 380 mm × 250 mm × 120 mm
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