Sigma Scientific Glass Pvt. Ltd offers Pipeline Filters. Sigma Scientific Glass Pvt. Ltd is an ISO 9001:2000 certified company. Pipeline Filters are used in chemical, pharmaceutical, dyes and allied industries. These are made of borosilicate glass 3.3 and PTFE or PFA, which ensures maximum resistance to corrosion. Pipeline Filters are used to remove impurities from gas and liquid streams in glass pipelines. Its assembly is designed such that the filter can be easily removed for cleaning or replacement.