1. BS 2627:1970. Specification for Wrought aluminium - For electrical purposes -Wire

2. BS 2633:1987. Specification for Class I arc welding of ferritic steel pipework for carrying fluids

3. BS 2640:1982. Specification for Class II oxy-acetylne welding of carbon steel pipework for carrying fluids

4. BS 2654:1989. Specification for Manufacture of vertical steel welded non- refrigerated storage tanks with butt-welded shells for the petroleum industry

5. BS 2690-102:1979. Methods of testing Water used in industry - Part 102: Hydrazine spectrophotometric method (4-dimethylaminobenzaldehyde)

6. BS 2690-104:1983. Methods of testing Water used in industry - Part 104: Silica reactive total and suspended

7. BS 2690-115:1983. Methods of testing Water used in industry - Part 115: clohexylamine spectrophotometric method

8. BS 2690-116:1983. Methods of testing Water used in industry - Part 116: Morpholine spectrophotometric method

9. BS 2690-117:1983. Methods of testing Water used in industry - Partnerships 117 Long-chain fatty amines spectrophotometric meth

10. BS 2690-15:1974. Methods of testing Water used in industry - Part 15: Free EDTA, total salts of EDTA, polyacrylate and polymethacrylate