1,ISO9001 quality certificate; 2,ISO14001 environment certificate; 3,CE certificate. ... strength is excellent. Few joints, no leaks.3, the construction and convenient4, friction coefficient is small, flow big five ... , -30 degrees, under normal temperature conditions during the construction do not have to take special protective measures.6, ... ×1/2FL32×3/4FL32×1FL63×2F top quality HDPE Female Elbow0322