PurposeMost academic studies of supply chain integration (SCI) have taken large-scale manufacturing environments as their source of empirical data. This paper aims to find the applicability of the dimensions of SCI in the context of project manufacturing environments.Design/methodology/approachThis paper uses a single-case-study approach to examine the network relationship among the constructor of an offshore wind farm, the provider of the main subsystems and two other companies providing subsystems and services in the project used as the empirical setting.FindingsThe findings suggest that although some of the dimensions of SCI in large-scale manufacturing environments might have similar applications in projects, some others might be unique to the context of large construction endeavors, e.g. relationship management, information integration and information sharing. An explanation of the possible causes for these differences is provided.Research limitations/implicationsThe findings cannot be generalized to the overall context of project manufacturing environments, as only one industry, the construction sector, was studied.Practical implicationsContrary to suggestions to relax the formal aspect of the partnership with the aim of improving the collaborative relationships, keeping the formality by means of contracts and nondisclosure agreements seems to be necessary for projects that have a considerable amount of resources and intellectual capital at stake.Originality/valueTo the best of the author's knowledge, this paper is one of the first case studies specifically designed to explore the applicability of the dimensions of SCI in project manufacturing environments. It aims to fill the gap of research carried out in these manufacturing environments, which represent a significant share of the world's economic output.