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PRODUCT TESTING AND INSPECTION PROCEDURE FOR LIGHTING FIXTURES 0 3 Alloy Industry Co., Ltd. 5.1 5.2 5.3 5.4 5.5 Revision: Visual Inspection Dimension Inspection Coating Thickness Inspection Thread Joint Inspection Final Inspection Issued Date: Doc. No. 4 4 4 5 5 23 February 202 AIC-SD-QA-05 FILE:D\SD\AIC-SD-QA-05.DOCX Page 2 of 5 TITLE: PRODUCT TESTING AND INSPECTION PROCEDURE CONTENTS: PAGE 1. 2. 3. 4. 5. Purpose Working Location Reference Measuring Equipment to be Used Testand Inspection Procedure 3 3 3 3 4

PRODUCT TESTING AND INSPECTION PROCEDURE FOR LIGHTING FIXTURES 0 3 Alloy Industry Co., Ltd. 3.1 3.2 3.3 1 2 3 4 5 6 Torque Wrench Tester มอก. Tester Revision: Plug Gauge Coating Thickness Gauge Vernier Caliper / VernierDigital Digital High Gauge Issued Date: Doc. No. Alloy’s Standard IEC 60079-1 Explosive atmospheres – Part 1: Equipment protection by flameproof enclosures “d” Industry Standard มอก. Product testing and inspection is conducted at Factory Site of Alloy Industry Co., Ltd. located at 179 Moo13, Phetkasem Road, Tambol Nong Aor, Amphur Ban Pong, Ratchaburi, 70110, Thailand The issue and revision of this document is to outline the product testing and inspection procedure which is applicable to all series of the Lighting Fixtures manufactured by Alloy Industry Co., Ltd. Following are the testing and inspections criteria: 1.1 1.2 1.3 1.4 1.5 Visual Inspection Dimension Inspection Coating Thickness Inspection Thread Joint Inspection Final Inspection 23 February 202 AIC-SD-QA-05 1. 2. 3. 4. Item Purpose: Reference: Working Location: : Equipment Name Equipment Picture FILE:D\SD\AIC-SD-QA-05.DOCX Page 3 of 5 Measuring Equipment to beUsed

PRODUCT TESTING AND INSPECTION PROCEDURE FOR LIGHTING FIXTURES 0 3 Alloy Industry Co., Ltd. 5.2.1 5.2.2 5.2.3 5.2.4 5.3.1 5.3.2 5.3.3 5.3.4 5.1.1 5.1.2 5.1.3 5.1.4 Revision: Issued Date: Method: 100% check dimension of the parts after machining process. Measuring Equipment: Vernier Caliper, Vernier Digital and Digital High Gauge. Specification: Dimension and tolerance of the parts is correct as per drawing defined. Result to be Obtained: Conformity with the drawing defined. Method: Random measured 5-6 positions of the parts surface after color coating process. Measuring Equipment: Coating Thickness Gauge. Specification: The average thickness is not more than 180m and not less than 65m. Result to be Obtained: Conformity with the spec defined. Doc. No. Method: 100% check physical appearance of the parts after machining process. Measuring Equipment: Visual inspection. Specification: Shape of the parts is correct as per drawing defined. Part’s surface shall be smooth and free from porosities and etc. Result to be Obtained: Conformity with the drawing defined. 23 February 202 AIC-SD-QA-05 5. 5.1 5.2 5.3 Visual Inspection Dimension Inspection. Coating Thickness Inspection FILE:D\SD\AIC-SD-QA-05.DOCX Page 4 of 5 TestandInspectionProcedure:

PRODUCT TESTING AND INSPECTION PROCEDURE FOR LIGHTING FIXTURES 0 3 Alloy Industry Co., Ltd. 5.4.1 5.4.2 5.4.3 5.4.4 5.5.1 5.5.2 5.5.3 5.5.4 Revision: Issued Date: Method: 100% check conduit entries to ensure fit function. Measuring Equipment: Plug Gauge (for female thread). Specification: The gauge is fit for conduit entries not less than 5 full threads. Result to be Obtained: Conformity with the IEC/EN 60079-1 standard defined. Doc. No. Method: - 100% check tightening force on threads. - 100% electrical function test (มอก. withstanding, insulation resistance, ground bond, leakage current, Watt, Amp and power factor). Measuring Equipment: - Torque Wrench Tester. - มอก. Tester. Specification: - The tightening force is complied as per specification defined. - The electrical function is complied as per standard มอก. defined. Result to be Obtained: - Conformity with the specification defined. - Conformity with the standard มอก. defined. 23 February 202 AIC-SD-QA-05 5.4 5.5 Thread Joint Inspection Final Inspection & Test FILE:D\SD\AIC-SD-QA-05.DOCX Page 5 of 5