Specifications:
The document outlines specifications for tubes and clamp fittings according to DIN 11866 and DIN 11850 Series 2 standards. It includes details for clamp elbows at 90 degrees with surface roughness values of Ra<0.8 and Ra<0.4.

Clamp Fittings:
The document provides a detailed table listing various clamp fittings with parameters such as nominal pressure (PN), nominal width (NW), diameter (D), wall thickness (d), and length (L). Each fitting is identified by a unique CL-No. and material grades 1.4404 and 1.4435.

Hygiene Classes:
The document specifies hygiene classes H3 and H4, indicating the internal surface finish requirements. Class H3 requires an internal surface roughness of Ra ≤ 0.8 μm, while Class H4 requires Ra ≤ 0.4 μm. The external surface is finely turned with Ra ≤ 0.8 μm.

Standards and Norms:
The fittings conform to various standards including DIN 32676, ISO, INCH, EN ISO 1127, and ISO 2852, ensuring compatibility and quality.