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Casing Large Outer Diameter Gauge JG3050-2
Electrical conduit gauge materials: Steel. This set of gauges refers to all the gauges specified in “JG 3050-1998 Electrical Conduit” for measuring relevant dimensions of conduit tubing. The gauges are applicable to round electrical conduits made of plastic insulating materials, used within buildings or structures to protect and secure wiring or cable installations. They include: Figure 2 of “JG 3050-1998 Electrical Conduit”—the maximum outer diameter gauge; Figure 3— the minimum outer diameter gauge; Figure 4— the minimum outer diameter gauge for semi-rigid and corrugated conduits; Figure 5— the minimum inner diameter gauge; Figure 6— the minimum inner diameter gauge; Figure 11— the thread gauge; Figure 12— the minimum inner diameter gauge after bending for semi-rigid and corrugated conduits; and the minimum inner diameter gauge after bending for rigid conduits, totaling 45 items. Specifically: In Figure 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 Figure 3, the minimum 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 Figure 4, the minimum outer diameter gauges for semi-rigid and corrugated conduits comprise 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 Figure 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 respective diameters are: 11.9, 15.5, 20.3, 26.3, 34.1, 42.8, and 55.2.
JLD-603 Wood Transverse Compressive Deformation Measurement Device
This apparatus is used to determine the proportional limit compressive strength of wood in the transverse direction, including both the overall and local proportional limit compressive strengths. It is suitable for measuring the transverse proportional limit compressive strength of sound small‑size specimens. The device complies with the requirements of GB/T 1927.12‑2021, “Test Methods for Physical and Mechanical Properties of Sound Small‑Size Wood Specimens — Part 12: Determination of Transverse Compressive Strength.”
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