Your DIN and EN piping material partner in Germany — delivering across Europe

Standards

DIN / EN / ISO

Location

Saarbrücken, Germany

Delivery

across Europe

Certificates

EN 10204 (2.2 / 3.1)

What we supply from stock

• Flanges to EN 1092-1 – welding neck, plate, blind, loose flanges and collars, PN 6 to PN 40, steel and stainless steel; ASME B16.5 flanges on request.
• Malleable iron fittings to EN 10242 – one of the largest GF (Georg Fischer) stock ranges in the German-speaking region, black and galvanised.
• Butt-welding fittings to EN 10253 – elbows, tees, reducers, caps in steel and stainless steel.
• Steel pipes – threaded pipes to EN 10255, seamless and welded pipes, precision tubes.
• Valves, gaskets and pipe supports – ball valves, butterfly valves, gate valves, flat gaskets, pipe clamps and U-bolts.

Why buyers across Europe work with us

• Genuine German stockholding: we ship from our own warehouse in Saarbrücken – not a trading desk without stock.
• Standards competence: DIN, EN and the old DIN designations that still circulate in existing plants – we translate between old parts lists and current standards.
• Certificates included: EN 10204 inspection certificates (3.1) supplied with the material on request; TÜV-Süd-certified re-stamping for cut parts.
• English-speaking export team: inquiries, offers and order processing in English.

English knowledge base

Technical reference pages in English – dimension tables and standards guides, maintained by our team:

• Flange standards explained: EN 1092-1, DN, PN, types & sealing faces – the flange hub: DN vs PN, old DIN numbers mapped to today's EN 1092-1 type numbers, and the sealing face forms A–H with roughness values.
• Flange dimensions PN 6 to PN 40 to EN 1092-1 – bolt circles, bolt holes, raised faces, pipe ODs and bolt sizes for DN 10 to DN 800, one table per pressure rating.
• Welding neck flange type 11: dimensions to EN 1092-1 – plate thickness, height, hub diameter and wall thickness by DN and PN, DN 10 to DN 800, with a dimensioned drawing and ordering example.
• Blind flange type 05: dimensions to EN 1092-1 – plate thickness and weights by DN and PN, DN 10 to DN 800, with a dimensioned drawing and ordering example.
• Plate flange type 01: dimensions to EN 1092-1 – bore B1, plate thickness and weights by DN and PN, DN 10 to DN 800, with a dimensioned drawing and ordering example.
• Threaded flange type 13: dimensions to EN 1092-1 – thread Rp to ISO 7-1, plate thickness, height and hub diameter by DN and PN, DN 10 to DN 150, with a dimensioned drawing and ordering example.
• Loose flanges type 02 and 04: dimensions to EN 1092-1 – the two-piece loose flange systems with plain collar 32 and welding neck collar 34, bore, collar thickness and weights per part, with dimensioned pairing drawings.
• ASME B16.5 flange dimensions: Class 150 to Class 2500 – bolt circle W, outside diameter O, raised-face diameter R, hole pattern Z × I, pipe OD and stud size, one table per pressure class, nominal sizes 1/2" to 24".
• Flange types international: ASME styles and their EN 1092-1 equivalents – weld neck, slip-on, threaded, socket weld, lap joint and blind mapped to EN types 11, 01, 13, 02/04 and 05, with facing codes and a DIN ↔ ASTM material cross-reference.
• EN 1092-1 vs ASME B16.5: flange standards compared – DN vs NPS, PN vs Class, dimensional comparison PN 16 vs Class 150 and why an adapter is needed between the two standards worlds.
• Flange connections and installation: the system of flange, gasket and bolt – sealing principle via bolt preload, installation sequence with cross-pattern tightening in stages, typical failure modes and inspection.
• Flat gaskets explained: types, materials, selection, installation – the gasket hub: how surface pressure seals a joint, the soft/semi-metallic/metallic gasket families, dimension standards EN 1514-1, DIN 2690 and ASME B16.20/21, and selection and installation criteria.
• Graphite gaskets explained: construction, service limits, resistance – laminate construction with a stainless steel insert, oxidation limit instead of melting point, chemical resistance and typical properties.
• Spiral-wound, camprofile and RTJ gaskets explained – construction and colour-code marking of spiral-wound gaskets to ASME B16.20, camprofile and metal-jacketed gaskets, ring-joint gaskets R/RX/BX to API 6A.
• Gasket installation and bolting: how the joint stays sealed – the proven 7-step installation sequence, bolt preload and lubrication (never the gasket), cross-pattern tightening in stages, and typical failure patterns with root causes.
• Flat gaskets to DIN EN 1514-1: dimension table form IBC – inside/outside diameter d1/d2 by pressure rating, form IBC, DN 10 to DN 500, PN 2.5 to PN 40, verified against the manufacturer's dimension table.
• Flat gaskets to DIN 2690 (withdrawn): dimension table for existing plant – complete dimension table DN 4 to DN 1400, PN 6 to PN 40, verified against the manufacturer's table, for identification and maintenance of existing plant.
• Malleable iron fittings to EN 10242 – standards, whiteheart malleable cast iron, threads R/Rp to EN 10226-1, sealing, finishes and GF type numbers.
• Inspection documents to EN 10204 – certificate types 2.1, 2.2, 3.1 and 3.2, the old "3.1B", plausibility checks and forgery warning signs.

More English pages are being added – the full knowledge base is available in German (77 pages).

Otto Zickwolff GmbH, Saarbrücken – long-established German piping material wholesaler. All information without guarantee; the current standard texts and manufacturers’ technical documentation always prevail. Editorially reviewed: July 2026.