1. BS 6861-1:1987. Balance quality requirements of rigid rotors - Part 1: Method for determination of permissible residual unbalance

2. BS 6866-1:1990 ISO 7278-1:1987 Proving systems for meters used in dynamic measurement of liquid hydrocarbons - Part 1: Introduction

3. BS 6867:2013. Maintenance of electrical switchgear and controlgear for voltages above 36 kV – Code of practice

4. BS 6870-2.1:1987 ISO 8558:1985. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.1 Method of preparation of pre-dried test samples

5. BS 6870-2.2:1987 ISO 8557:1985. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.2 Method for determination of hygroscopic moisture in analytical samples gravimetric method

6. BS 6870-2.3:1987 ISO 6606:1986. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.3 Method for determination of loss of mass at 1075 °C gravimetric method

7. BS 6870-2.4:1987 ISO 6607:1985. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.4 Method for determination of silicon content combined gravimetric and spectrophotometric method

8. BS 6870-2.5:1987 ISO 6609:1985. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.5 Method for determination of iron content titrimetric method

9. BS 6870-2.6:1987 ISO 6994:1986. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.6 Method for determination of aluminium content EDTA titrimetric method

10. BS 6870-2.7:1987 ISO 6995:1985. Analysis of aluminium ores - Part 2: Chemical methods - Section 2.7 Method for determination of titanium content spectrophotometric method