2. MATERIAL OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS
3. SPECATION OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS
4. PRODUCTION OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS

5. Mill OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS
6. TESTING OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS
7.LOADING AND DELIVERY OF SPECIFICATION CARBON STEEL PIPE ROUGHNESS
