Professionalism. Technologies. Precision.

Words that best describe our philosophy. We supply piping systems and piping parts, welding and assembly of technological units.

About Us

Infer s.r.o. is a company that plays a significant role in the field of mechanical engineering. We specialise in supplying products to the energy, petrochemical, water management and automotive markets, and refineries. Our range of products includes piping systems, technological assemblies, valves and metallurgical material.

Telephone number: +420 720 982 749

Chotíkov 451
330 17 Chotíkov
District Plzeň-sever, Pilsen Region

The products and services we provide are as follows:

  • Delivery of turnkey piping systems and valves, technical documentation (production and assembly) included
  • Prefabrication of piping and steel structures
  • Pressure vessels
  • Assembly
  • Pressure testing and NDT
  • Delivery of metallurgical material
  • Surface finishing
  • Thermal processing
  • Machining
  • Welding

Customer satisfaction is Infer s.r.o. company’s main priority, which is why we deal with every order individually and with great precision.

Piping Components and Assemblies

Our primary focus is supply of piping assemblies and individual piping components. Our customers can choose from a wide range of pipes, fittings, elbows, reductions, T-pieces, flanges, valves, hollow sections and other components.

We also provide turnkey projects: technical documentation (production and assembly), delivery, prefabrication, assembly, quality documentation.

Because our company delivers products worldwide, we are able to adapt to any type of demand, including requests for replacement of old technology or for assembly of new equipment. Everything is taken care of from initial design to final setup.

Boiler seamless pipes according to EN (stainless, carbon, alloy)
Seamless pipes according to ASTM/ASME (stainless, carbon, alloy)
Pipes for chemical and petrochemical use (stainless, carbon, alloy)
Boiler pipes welded (carbon)
Pipes for hydraulic lines (seamless)
Pipes for hydraulic cylinders
Heat resistant pipes
Precision pipes (seamless and welded)

Comparison of materials according to standards

Flanges (stainless, carbon, alloy)

Fittings (stainless, carbon, alloy)
Elbows seamless and welded
Bends seamless and welded

We also offer

If requested, we (also) perform the following pipe fitting services: cutting into accurate lengths, bending, side and end notching and machining, and surface finishing.


The engineering process involves processing of projects, designs and calculations for technological equipment and structures.

In this area, we provide the following services:
Structural analysis of piping
Calculations for special structures
Pipe spool calculations and drawings
Design of piping components
Construction of pressure vessels and tanks
Testing and inspection plans
Processing of project documentation for piping systems

Additionally, in case of interest, we will ensure the implementation of the project itself.

Our customers are provided with complex services during the actual project realisation.


Precise and high-quality machining is the pride of our company.
We use conventional and CNC machines.

Turning: from Ø 6 mm to Ø 680 mm.
Milling: a wide range with maximum table dimensions of 1800 × 1800 mm.
Surface grinding: maximum workpiece dimensions of 600 × 200 mm.
Cylindrical grinding: up to Ø 250 mm.
Thread rolling: thread Ø up to 40 mm depending on the material and type of thread.
Cutting: up to Ø 450 mm.

Surface finishing:
Galvanisation, Painting, Sandblasting, Metal shot blasting, Conservation, Bluing

Thermal processing:
Quenching, Annealing, Nitriding, Tempering

Other services

Our company has a wide range of products and services in its portfolio. We pride ourselves on the quality of the materials used and the carefulness of our production.


Small and medium carbon and stainless steel weldments that are produced using documentation provided by the customer. Wielding methods: TIG, MIG/MAG a MMA according to ČSN EN ISO 3834 a ASME B31.1 norms.


Assembly and disassembly of technological units, piping systems, NDT tests (pressure and leak tests), commissioning. We also offer installation and testing of fittings.


We also provide the following: Forgings, Cutting into precisee lengths, Pipe and sheet  metal bending baseed on desings, End and side notching, Other machining, Surface finishing.


All our products undergo technical inspection from the initial delivery of material to the incoming finished product inspection. The quality management system of our company is in compliance with the ČSN EN ISO 9001:2016 norm.

We deliver all products with attestation EN 10-204 / 2.1, 2.2, 3.1, 3.2., and a dimensional results report in paper or digital form. In the case of welding projects, we can also provide full quality documentation, including the relevant WPQR, WPS, welding plan and NDT testing (VT, MT, PT, RT, UT, leak and pressure tests).

Our quality management system includes structure and quality control of materials using the handheld DELTA ED-XRF x-ray spectrometer. We also perform very accurate and fast non-destructive chemical analysis of materials with the percent composition of identified elements in compliance with the material norm or the equivalent thereof (EN, DIN, CSN, ASME).

Packaging and Delivery

Our products are packed in standard cardboard boxes or laid on pallets. If required, we can also deliver products in overseas packaging (wooden boxes; 20ft and 40ft containers).

Our deliveries follow INCOTERMS 2010 and we can organise delivery at place according to the terms of this regulation.