Plant industry is one of important industry that possesses 70% of fund in construction contracts for oversea customers at 2004. It is called E(Engineering), P(Procurement), C(Construction) industry. Plant industry of Korea has a competitive power of the detail design and operation for the establishment construction. But among E, P, C at plant industry, technic of E part which is able to make higher profits; Planning and basic designing; are poor. They should have much more improvements. Thus to enhance a competitive power of planning and basic designing, we are going to analyze problems of utilizing a standard code for plant design and present plans for their improvements.