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During the IPS period, pipes were cast in halves and welded together, and pipe sizes referred to the inside diameters. [1] The inside diameters under IPS were roughly the same as the more modern Ductile Iron Pipe Standard (DIPS) and Nominal Pipe Size (NPS) Standards, and some of the wall thicknesses were also retained with a different ...
[1] [2] It was used from the 1860s through the 1970s, when it was replaced by PVC pipe for water supply and ABS pipe for drain-waste-vent (DWV) applications. The name comes from Orangeburg, New York, the town in which most Orangeburg pipe was manufactured, largely by the Fiber Conduit Company. It changed its name to the Orangeburg Manufacturing ...
Formally, the agency as it exists today was formed under the Customs Ordinance No. 17 of 1869, to which 51 amendments have been made to date. Being a center for trade in the Indian Ocean since antiquity, however, the history of collection of customs duties in Sri Lanka dates far back as the second century BC. [citation needed]
A number of different units of measurement were used in Sri Lanka to measure quantities like length, mass and capacity from very ancient times. [1] Under the British Empire, imperial units became the official units of measurement [2] and remained so until Sri Lanka adopted the metric system in the 1970s. [3] [4]
The Central Bank of Sri Lanka has issued commemorative coins since 1957. On 15 December 2010, to mark the 60th Anniversary, the Central Bank of Sri Lanka issued a frosted proof crown size multi-colour silver commemorative coin in the denomination of Rs. 5,000/-. It was the first multi-colour coin issued by the Central Bank.
The National Water Supply and Drainage Board (commonly abbreviated as NWSDB) is the National Organization responsible for the provision of safe drinking water and facilitating the provision of sanitation to the people in Sri Lanka. The organization had its beginning as a subdepartment under the Public Works Department for water supply and drainage.
Information technology companies of Sri Lanka (1 C, 5 P) M. Manufacturing companies of Sri Lanka (3 C, 6 P) Mass media companies of Sri Lanka (20 C, 4 P) P.
Gold and copper coins issued by the Chola ruler Rajaraja Chola (985-1014) are excavated from many parts of Sri Lanka. The obverse and reverse of these coins are similar to the common Dambadeniya Massa coins issued by later Kalinga and Pandya rulers of Sri Lanka.