To use cst,pf and esi

I have a software company.It is a Pvt.Ltd Company.CST,VAT,PF and ESI are registered in this Pvt.Ltd Company. In CST and VAT it is mentioned to supply electrical and Electronics Items also along with IT related Items.

I am a partner in one of my friend firm which is mainly provide service on electrical . It's a partnership firm.Both the company have their own service tax number.

But now my question is that - is it possible to use the CST,VAT,PF and ESIC number of the Pvt.Ltd company in that partnership firm. If we colaborate the Pvt.Ltd Company and the partnership firm in an agreement. As both of their service tax number is different and bank account is different. But sometime in the tenders it is asked to do some electrical work also. 

I want to know that PF,ESI and CST is not registered with the partnership firm. In that case can that partnership firm use the PF,ESI and CST Number for its employee also.As the partnership firm is a collaborate company of the private limited company.