a. The BOP is designed and manufactured according to specifications API Spec 16A.

b. The part in the BOP, in contact with liquid in well is resistant to hydrogen sulfide stress corrosion, and the

requirements of NACE MR-0175 are met.

c. The weight of BOP in the connection mode of flanged is showed in the table (see Fig.2-1, Fig.2-2, including ram

assembly). The actual weight shall change with the change of the upper and the lower connection and the side port.