REPLACEMENT OF VALVE USING ALSTERN’S BALLOON LINE STOP CATEGORY: LINE STOPPING
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TEE OFF 600MM BRANCH FROM 600MM HEADER BY HOT TAPPING CATEGORY: HOT TAPPING
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INSERTION OF BRANCHES USING HOT TAPPING SERVICE CATEGORY: HOT TAPPING
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REPLACEMENT OF VALVE USING PIPE FREEZING SERVICE CATEGORY: PIPE FREEZING
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