Does not fit does not exist. Thanks to our machine shop.
Even for parts that aren’t in stock, we can find a solution: our turning shop can machine flanges, fittings and pipe elbows to your exact specifications …
Standard dimensions don’t cover every requirement. Whenever flanges, fittings or elbows need to be adapted, modified or manufactured as bespoke parts, our in-house turning shop comes into its own. At its Rastede site, WITTE Tube operates a conventional turning shop covering approximately 713 m² of production floor space, where stainless steel pipe fittings are precisely machined, adapted and remanufactured as individual parts or in small batches.
The result: the shortest lead times for modified fittings and special parts, manufactured to an accuracy of 0.1 mm.
What does an in house machine shop for pipe fittings deliver?
Many projects in pipeline construction, plant engineering and process technology require components that aren’t available from the standard programme. Our stainless steel machine shop covers this with three core capabilities:
● Machining and modification: Welded fittings and flanges are modified to customer specification. Whether chamfering, facing, boring or grooving, every operation is carried out precisely and to standard.
● Manufacture from bar stock: If a required part can neither be supplied from stock nor produced by modifying an existing fitting, it is manufactured directly from bar stock. This allows full flexibility in stainless steel materials and geometry, including alloys for high temperatures.
● Small batches and single parts: Precision turned parts and special components are manufactured both as single items and in small batches, with consistently high dimensional accuracy of 0.1 mm.
Which machining operations are available?
Our machine shop covers a broad range of machining operations for stainless steel pipe fittings, from cnc turning stainless steel through to finishing work on ready fittings:
● Chamfering and facing of flanges and fitting ends
● Internal turning of connection sizes from 1/2 inch to 8 inches
● Flat grinding up to 16 inches in diameter
● Weld bevel preparation in accordance with DIN 2559 and ASME
● Cutting pipe bends to length at variable angles
● Axial and internal grooving
● Manufacture of concentric and eccentric reducers
● Machining of flanges to customer drawings
Which parts can be manufactured?
In addition to modifying existing pipe fittings, the following components can be manufactured from scratch:
● Concentric and eccentric reducers
● Tees in special geometries
● Threaded parts and threaded fittings
● Hexagonal parts
● Weld neck rings
● Turned parts to drawing in geometries defined by the customer
● Stainless steel turned parts as single items or small batches
● Precision turned components with tight tolerances
Manufacturing is based on customer drawings or in close coordination with our technical sales team.
What is a weld neck ring?
A weld neck ring is a turned ring element made of stainless steel, welded into a pipeline or fitting. It serves as a defined weld stop, as compensation in wall thickness when joining sections of different thicknesses, or as a transition element between two pipe sections. Weld neck rings are commonly used where the geometry of the parts to be joined makes direct welding difficult, or where transitions in wall thickness compliant with DIN or ASME are required. Manufacture follows the drawing, in the appropriate material.
What machine capacity is available?
Our machine shop is equipped with modern turning and machining equipment for a wide dimensional range:
● Conventional lathe: up to 1,000 mm turning diameter
● Cyclically controlled lathe: up to 570 mm turning diameter
● Grinding: up to 16 inches in diameter
● Internal turning: 1/2 inch to 8 inches
● Connection sizes: 1/2 inch to 8 inches
With experienced machinists and roughly 713 m² of production space, we can respond quickly even to urgent requests.
To which standards and certifications does the machine shop work?
Manufacturing and machining in our machine shop follows recognised national and international standards. All manufactured and machined parts are available with inspection certificates to EN 10204.
● AD-2000 W0 certified manufacturer
● PED (Pressure Equipment Directive) compliant manufacturing
● DIN 2559 for weld seam preparation
● ASME for international projects
Certification to AD-2000 W0 and PED ensures that manufactured and machined parts for pressure equipment meet the requirements for use in pressurised systems.
Which industries and applications is the machine shop relevant for?
Our services in custom stainless steel fabrication are in demand wherever standard parts fall short and special solutions have to be available fast:
● Pipeline and plant engineering for process and industrial plant
● Chemical and petrochemical industry with tight tolerance and certification requirements
● Power plants and energy generation with individual component requirements
● Mechanical and apparatus engineering with demand for single parts and small batches
● Offshore and marine with international standard and certification requirements
Our own machine shop on site is a decisive advantage especially in situations where downtime is costly and standard parts cannot be sourced at short notice.
Which materials does the machine shop work with?
The turning shop specialises in the machining of stainless steels:
● Standard austenitic stainless steels such as 1.4404 or 1.4571
● Duplex steels such as 1.4462 and 1.4410
● High temperature materials such as 1.4841, 1.4845 and 1.4878
● Special alloys to customer specifications
Detailed information on the available pipe fittings and materials can be found in the product categories: pipes, pipe bends,flanges and collars.
