It took 24 months to build the warships with China’s technical assistance.
Two more warships built at the Khulna shipyard are scheduled to be commissioned next month.
President Md Abdul Hamid will attend the commissioning ceremony as the chief guest on November 8 at Titumir Naval Jetty in Khalishpur.
The Tk8 billion warships have been named â€˜Nishanâ€™ and â€˜Durgomâ€™. Apart from them, two submarine tugboats â€“ â€˜Haldaâ€™ and â€˜Poshurâ€™ â€“ have been built at a cost of Tk142 crore.
Sources say the warships conducted initial trial runs in Bhairab and Rupsha rivers. â€˜Durgomâ€™ started for the Bay of Bengal for sea trial on Tuesday. â€˜Nishanâ€™ will go out to the sea on Friday.
Khulna Shipyard Limited General Manager (production) Captain M Nurul Islam Sharif said the warships would have cost Tk1,000 crore if they were constructed abroad.
â€œWarships are essential for the navyâ€™s works to ensure safety of the maritime area, resource exploitation and proper sea management,â€ he said.
Prime Minister Sheikh Hasina inaugurated the construction work on September 6, 2015.
It took 24 months to build the 64.2-metre long and nine-metre wide warships with Chinaâ€™s technical assistance. Their top speed is 25 nautical miles per hour.
The 32-metre long tugboats, equipped with modern military technologies, have been built with Malaysiaâ€™s technical assistance.
Five other warships had been built by Khulna Shipyard Limited â€“ an independent government commercial enterprise under the Ministry of Defense, operated by Bangladesh Navy.
The shipyard commenced operations in 1957 and was was handed over to the navy in 1999. It has so far constructed 725 ships and repaired 2,224 vessels.