Special and drawing parts made to your drawing
Pipe fittings beyond standard product ranges – manufactured, tested and fully documented by the manufacturer in Unna, Germany.
up to
up to
(150 – 1,500 t)
to EN 10204
What are special and drawing parts?
In short: Special and drawing parts are pipe fittings and piping components outside standardised product ranges. They are made on the basis of technical drawings, project-specific specifications or individual customer requirements – whenever geometry, wall thickness, material or documentation requirements cannot be covered by standard components.
Typical applications
- Pipe fittings with geometries outside EN 10253 / ASME B16.9
- Special radii (e.g. 2D, 4D, 5D), custom angles, asymmetrical designs
- Type B components with increased wall thickness for safety-critical systems
- Extended ends, connections or nozzles to drawing
- Heavy-wall designs beyond the standard tables
- Combined components from forming and machining
- Spare parts for existing plants without a valid standard
- Prototypes and first articles for new plants
Special and drawing parts at a glance
The key technical data – as compact as a works data sheet.
- Designs
- Special radii (e.g. 2D, 4D, 5D), custom angles, Type B to EN 10253-2 (elbows and tees), transition pieces, combination parts, eccentric bends, heavy-wall caps, components to customer drawing
- Manufacturing
- Hot and cold forming on hydraulic presses from 150 to 1,500 t, machining (turning, milling, drilling), welding to WPS / ASME IX / EN ISO 15614, heat treatment (volume up to 10 m³)
- Dimensions
- Outside diameter up to 610 mm, wall thickness up to 100 mm
- Materials
- Carbon and low-alloy steels, low-temperature steels, creep-resistant steels incl. P91 / P92, austenitic stainless steels, duplex / super duplex, nickel alloys, special materials on request
- Standards
- EN 10253-2, ASME B16.9, ASME B31.1 / B31.3, EN ISO 15614, ASME IX as well as customer-specific drawings and specifications
- Testing
- Individual ITP, visual and dimensional inspection as standard; NDT (RT, UT, MT, PT), PMI, material testing and third-party inspection on request; verification of tint, Ts and Tb dimensions for Type B components
- Documentation
- Inspection certificate to EN 10204 3.1 or 3.2, full material traceability, dimensional inspection report to drawing
- Certifications
- DIN EN ISO 9001:2015, ISO 19443:2018 (nuclear)
- Quantities
- Single parts, small batches, prototypes and first articles
How does an inquiry for drawing parts work?
From drawing to delivery with inspection certificate – in five steps.
- 01
Send your inquiry
Drawing or component description with main dimensions, material, operating conditions, quantity and required delivery date – directly via the form below.
- 02
Technical review
We check feasibility, manufacturing method, material and scope of testing and get back to you with an assessment.
- 03
Quotation
Quotation including scope of testing and documentation – with a project-specific ITP on request.
- 04
Manufacturing & testing
Manufactured in Unna to drawing and ITP – with first article inspection and approval, and third-party inspection on request.
- 05
Delivery
With inspection certificate to EN 10204 3.1 or 3.2 and complete documentation – seaworthy packaging on request.
Manufacturing & technical capabilities
Our special and drawing parts are made from seamless pipes, forgings or plates and, depending on requirements, hot or cold formed and machined – on hydraulic presses from 150 to 1,500 t. Each part follows an individually designed process, matched to geometry, material and application.
Our in-house tool and die shop makes new dies and tools for special geometries – right here in Unna.
Manufacturing methods – individually or combined
- Hot forming – heavy walls, creep-resistant steels, special geometries (up to 1,500 t press, wall thickness up to 100 mm)
- Cold forming – smaller dimensions, austenitic steels, high dimensional accuracy
- Machining – turning, milling, drilling for precision parts and sealing faces
- Welding and machining to WPS / ASME IX / EN ISO 15614 – for transition pieces and combination parts
- Blasting, pickling, coating
- Heat treatment in our own furnace (volume up to 10 m³)
- Seaworthy packaging for international shipping
Possible designs to customer requirements
- Fittings to drawing
- Special radii (e.g. 2D, 4D, 5D) and custom angles
- Elbows and tees in Type B to EN 10253-2
- Eccentric and complex geometries
- Transition pieces and combination parts
- Heavy-wall components and caps beyond the standard tables
- Extended ends, nozzles and connections to drawing
- Prototypes and first articles
- Spare parts for existing plants
Standards & codes
Special parts are manufactured and documented to the codes applicable to each project:
- EN 10253-2 / ASME B16.9 – as a basis with project-specific deviations
- EN ISO 15614 / ASME IX – qualification of welding procedures
- ASME B31.1 / B31.3 – Power Piping / Process Piping
- EN 13480 – Metallic industrial piping
- ASME B31.12 – Hydrogen Piping
- KTA 3201 / RCC-M – nuclear technology
- NORSOK M-630 – offshore projects
- Customer-specific drawings and specifications
Materials
We manufacture special fittings from all materials available at Nirotec – special materials on request; in principle, all weldable materials are possible. All materials are fully traceable and supplied with an inspection certificate to EN 10204 3.1 or 3.2.
Unalloyed and low-alloy steels
- P235GH / 1.0345
- P265GH / 1.0425
- P355GH / 1.0566
- L360 / 1.0582 / API 5L X52
- L415 / 1.8972 / API 5L X60
- WPB / A234 WPB / Carbon Steel
- WPHY70 / A860 WPHY70
Low-temperature steels
- WPL3 / A420 WPL3
- WPL6 / A420 WPL6
- LF2 / A350 LF2
- P355NL2
- P460NL2
- 10Ni14
- 12Ni14 / 1.5637
Creep-resistant steels
- 16Mo3 / 1.5415
- WP11 / P11 / 1.7335 / 13CrMo4-5
- WP22 / P22 / 1.7380 / 10CrMo9-10
- WP91 / P91 / 1.4903 / X10CrMoVNb9-1
- WP92 / P92 / 1.4901 / X10CrWMoVNb9-2
- X20 / 1.4922 / X20CrMoV11-1
- WB36 / 1.6368 / 15NiCuMoNb5
Austenitic stainless steels
- 304 / 1.4301 / X5CrNi18-10 / V2A
- 304L / 1.4307 / X2CrNi18-9 / TP304L / WP304L
- 316L / 1.4404 / X2CrNiMo17-12-2 / TP316L / WP316L / V4A
- 316Ti / 1.4571 / X6CrNiMoTi17-12-2 / TP316Ti / WP316Ti
- 321 / 1.4541 / X6CrNiTi18-10 / TP321 / WP321
- 347H / 1.4912 / X7CrNiNb18-10 / TP347H / WP347H
- 310S / 1.4845 / X8CrNi25-21 / TP310S / WP310S
Duplex and super duplex
- Duplex / 1.4462 / X2CrNiMoN22-5-3 / UNS S31803 / F51
- Super Duplex / 1.4410 / X2CrNiMoN25-7-4 / UNS S32750 / F53
- Super Duplex / 1.4501 / X2CrNiMoCuWN25-7-4 / UNS S32760 / F55
- 254SMO / 1.4547 / X1CrNiMoCuN20-18-7 / UNS S31254
- Alloy 926 / 1.4529 / X1NiCrMoCuN25-20-7 / UNS N08926
- 904L / 1.4539 / X1NiCrMoCu25-20-5 / UNS N08904 / 2RK65
Nickel alloys
- Monel 400 / 2.4360 / UNS N04400
- Alloy 625 / 2.4856 / UNS N06625 / Inconel 625
- Alloy 825 / 2.4858 / UNS N08825 / Incoloy 825
- Alloy C-276 / 2.4819 / UNS N10276 / Hastelloy C-276
- Alloy 718 / 2.4668 / UNS N07718
- Alloy 800H / 1.4876H / UNS N08810
- Alloy C-22 / 2.4602 / UNS N06022 / Hastelloy C-22
Copper-nickel and special materials
- CuNi10Fe1Mn / 2.0872 / C70600 / CuNi 90/10
- CuNi 70/30 / 2.0882 / C71500
- Zirconium 702 / UNS R60702
Quality testing & documentation
Every special part is tested and documented according to an individual Inspection and Test Plan (ITP) – matched to the applicable code, pressure equipment category and customer requirements.
- First article inspection and approval
- Visual and dimensional inspection (standard), dimensional inspection report to drawing
- Inspection certificates to EN 10204 (3.1 / 3.2)
- Non-destructive testing (RT, UT, MT, PT), PMI and material testing (tensile, impact, hardness) on request
- Verification of tint, Ts and Tb dimensions for Type B components
- Third-party inspection by TÜV, SGS, Bureau Veritas, DNV or customer inspectors
- Full material traceability
In use worldwide
Special parts from Nirotec are used wherever standard pipe fittings are not sufficient. Custom-made piping components are particularly important in projects with high technical requirements, small quantities or complex plant structures.
Frequently asked questions about special and drawing parts
What are drawing parts?
Drawing parts are components manufactured to a customer’s technical drawing or specification – rather than taken from a standardised product range. At Nirotec, these are mainly pipe fittings such as elbows, tees, transition and combination parts with special geometries, wall thicknesses or materials.
How can I request special or drawing parts?
The easiest way is the form below – you can upload your drawing directly. For a quotation we need: technical drawing or component description with main dimensions, material (EN or ASME designation), application and operating conditions (pressure, temperature, medium), quantity and required delivery date, required standards, testing and documentation and, if applicable, a project-specific specification or ITP requirement.
What dimensions and wall thicknesses are possible?
We manufacture on hydraulic presses from 150 to 1,500 t – with outside diameters up to 610 mm and wall thicknesses up to 100 mm. Heat treatment is possible up to a volume of 10 m³.
Does Nirotec also make single parts and prototypes?
Yes. We manufacture special and drawing parts individually or in small batches – including prototypes, first articles or spare parts for existing plants.
Which tests and documents will I receive?
Every special part is tested according to an individual ITP. The standard scope includes visual and dimensional inspection, an inspection certificate to EN 10204 3.1 or 3.2 and full material traceability. NDT, PMI, material testing and third-party inspection are available on request; for Type B components we verify the tint, Ts and Tb dimensions as standard.
Do you also manufacture special parts in Type B to EN 10253-2?
Yes. We manufacture elbows and tees in Type B with increased wall thickness for safety-critical systems – for example in nuclear technology, high-pressure applications and power plants.
Last updated: October 2026
Looking for a component made to drawing?
Nirotec manufactures special and drawing parts – including small quantities, special materials and complete documentation. Send us your drawing or specification – we will get back to you with an assessment.
For a quotation we need
- Drawing or component description with main dimensions
- Material and operating conditions (pressure, temperature, medium)
- Quantity and required delivery date
- Required standards, testing and documentation
