• Magazijnweg 4, 2404 CE, Alphen aan den Rijn, The Netherlands | Office hours 08.00 till 17.00 (GMT +1) | Service 24/7


About HWI Machining

HWI Machining is your supplier for machined pressure vessels, complex parts and other high- quality products. Our equipment ranges from manually programmed machines to fully CAD-CAM driven CNC 5-axis milling combinations. As a member of HWI Group we Design, Engineer, Machine, Assemble and Test under one facility.

HWI Production


Turning is one of our prime production capabilities in our machining department. We have modern CNC lathes and conventional machines, these machines are capable up to Ø1600 in diameter.

Milling and Drilling

With years of experience in machining and professional milling machine equipment we offer the highest quality at a competitive price. We have machines capable up to 5-axis simultaneous.


HWI Machining is authorized by DNV GL to restamp materials with a 3.1 inspection report or 3.2 inspection certificate in accordance with EN 10204.

Custom made

HWI Machining is a specialist in custom-made products. Together with our customers we find the best solutions. We support during Engineering, Machining, Assembling and Testing.

TM Service and manufacturing

TM Filters

TM Filters (previous Pressure Equipment Holland) has in-house Design, Manufacturing, Inspection and Testing capabilities. TM Filters is your partner in protecting important Turbomachinery equipment such as Turbines, Compressors and Pumps. Our excellent know how and experience in dealing with complex projects, ensures reliable partnership, on time delivery and optimal performance on all your enquiries and orders.

HWI Group

HWI Group is your ultimate supplier for machined parts and filters. We design, engineer, machine, assemble and test everything in one facility. HWI Machining and TM Filters will deliver custom made solutions, advice and services.