/ Von Laffert services for the qualities of our stainless steel tubes
Stainless steel tube qualities at a glance
In order to fulfil the individual requirements of a wide range of industries, our stainless steel tubes are manufactured in different quality levels.
The surface finish plays a decisive role here:
It not only influences the flow behaviour of media, but also the purity, corrosion resistance and durability of the entire system.
From the standard quality to the electropolished premium version, we offer graded quality classes with different roughness values (Ra).
Each design is carefully checked and meets the applicable industry standards for the highest quality.
Whether in hydraulics, measurement and control technology or in all processes under clean room conditions:
Our pipe systems fulfil the highest standards of surface cleanliness and precision.
Through the combination of modern production technology and thorough chemical or electrochemical polishing, we ensure that our pipe systems function reliably over the long term and guarantee the required qualities. This gives you products that are perfectly customised to your processes and offer maximum safety, even for sensitive applications.
- von Laffert MSR - Hydraulic pipe
- von Laffert A - Roughness Ra less/= 1.0/0.8µm chemically cleaned free of oil and grease
- von Laffert B - Roughness Ra less than/= 0.4µm chemically cleaned free of oil and grease
- von Laffert C - Roughness Ra less than/= 0.2µm electrochemically polished
/ Von Laffert overview of our qualities
For purity and precision
The technical information on the individual qualities „MSR“, „A“, „B“ and „C“ contains detailed information on surface roughness, cleaning and processing. All information is available as tables in the download area.
Technical information von Laffert „MSR“
Technical information von Laffert „MSR“
| Materials: | DIN 1.4435/ AISI 316 L, other materials, e.g.: 1.4404, 1.4571, 1.4541, 1.4301, 1.4306 as well as e.g.: 1.4410, 1.4462, 1.4501, 1.4529, 1.4539, 1.4547, 1.4841, 1.4845, 1.4876, 2.4360, 2.4819, 3.7035, 254-SMO, 6Mo, or Alloy 400, Alloy 600, Alloy 601, Alloy 825, Alloy C22, Alloy C 276, UNS S31803, UNS S32750, Titanium Gr.2, 904L available. |
| Execution: | According to DIN EN 10216-5 11/04 under exclusion of point 8.5.1.1, or ASTM A 269 (’96)/ A 213 (’95a) or comparable Test category 1, Tab. 1/CFA, bright annealed, straightened. |
| Tolerances: | Outside diameter restricted according to DIN EN ISO 1127 (03/97): D4/T3, or ASTM A 269 (’96)/ A 213 (’95a), or EN ISO 10305 Pk1. |
| Hardness: | Soft annealed, controlled HRB ≤ 80, or HV ≤ 180. |
| External surface: | Macroscopically free of grooves. |
| Pipe lengths: | Approx. 6 m, or production lengths approx. 4-7 m, alternatively as coils. |
| Testimonial: | DIN EN 10204 3.1 01/05, AD 2000-W2 02/08. Installation pipes (without US test) available on request. |
| Areas of application: | Clamping and cutting ring fitting systems as well as other demanding applications such as leak-tight screwed measuring, control and hydraulic systems. |
| Certification: | Production according to ISO 9001. |
| Packaging: | Protection against transport and handling damage through appropriate packaging. |
Technical information von Laffert „A“
| Material: | Stainless steel pipe DIN 1.4435 or 1.4404 / AISI 316L, seamless, cold drawn, then bright annealed. |
| Execution: | DIN EN 10216-5 03/14 PK 1, Tab. 1/CFA (dew point of < -45 °C), or ASTM A 269 (’96) / A 213 (’95a), Pipes straightened, cut at right angles to the pipe axis for orbital welding. |
| Tolerances: | DIN EN ISO 1127 (03/’97): D4 / T3, or ASTM A 269 (’96). |
| Hardness: | Controlled ≤ HRB 80 or HV 180. |
| External surface: | In accordance with DIN/EN 10216-5 03/14 PK 1, bright annealed, Table 6, type of finish: n2, macroscopically free of scoring. |
| Interior surface: | Roughness Ra ≤ 0.8 µm (aimed for). Roughness depth measurement according to ISO 468 and ISO 4288 as well as DIN 4768. Chemically cleaned free of oil and grease in accordance with ASTM A 632, supplement 3, „Thermo Couple Clean“, O₂-oxygen suitable (CFOS). CFC-free production and cleaning. |
| Pipe lengths: | Approx. 6,000 mm or 5,000-7,000 mm, alternatively as ring goods. |
| Testimonial: | According to EN 10204 3.1 B (08/’95). 100 % Eddy current flaw detection according to BS 3889. 100 % optical surface inspection. |
| Packaging: | Pipe ends sealed with caps to prevent contamination, packed in PE tubular film. Protected against transport and handling damage by appropriate packaging. |
| Certification: | Production according to ISO 9001. |
Technical information von Laffert „B“
| Material: | Stainless steel pipe DIN 1.4435 or 1.4404 / AISI 316L, seamless, cold drawn, then bright annealed. |
| Execution: | DIN EN 10216-5 03/14 PK 1, Tab. 1/CFA (dew point of < -45 °C), or ASTM A 269 (’96) / A 213 (’95a), Pipes straightened, cut at right angles to the pipe axis for orbital welding. |
| Tolerances: | DIN/EN 1127 (03/’97): D4 / T3, or ASTM A 269 (’96). |
| Hardness: | Controlled ≤ HRB 80 or HV 180. |
| External surface: | According to DIN 17458 (07/’85), bright annealed, Table 6, type of finish: n2, macroscopically free of scoring. |
| Interior surface: | According to DIN/EN 10216-5 03/14 PK 1, Tab. 6, type of finish: n2, mechanically polished, roughness Ra ≤ 0.4 µm. Roughness measurement according to ISO 468 and ISO 4288 as well as DIN 4768. Chemically cleaned free of oil and grease in accordance with ASTM A 632, supplement 3, „Thermo Couple Clean“, O₂-oxygen suitable. CFC-free production and cleaning. |
| Contamination: | Water-soluble residues: max. 0.8 mg/m². Water-insoluble residues: Max. N 30: ≤ 30 particles ≥ 1 µm / ft³. |
| Pipe lengths: | Approx. 6,000 mm or 5,000-7,000 mm. |
| Testimonial: | According to EN 10204 3.1 B (08/’95). 100 % Eddy current flaw detection according to BS 3889. 100 % optical surface inspection. |
| Packaging: | Pipe ends sealed with caps to prevent contamination, packed in PE tubular film. Protected against transport and handling damage by appropriate packaging. |
| Certification: | Production according to ISO 9001. |
Technical information von Laffert „C“
| Material: | Stainless steel pipe DIN 1.4435 or 1.4404 / AISI 316L, seamless, cold drawn, then bright annealed. |
| Execution: | DIN EN 10216-5 03/14 PK 1, Tab. 1/CFA (dew point of < -45 °C), or ASTM A 269 (’96) / A 213 (’95a), Pipes straightened, cut at right angles to the pipe axis for orbital welding. |
| Tolerances: | DIN EN ISO 1127 (03/’97): D4 / T3, or ASTM A 269 (’96). |
| Hardness: | Controlled ≤ HRB 90 or HRB 80. |
| External surface: | In accordance with DIN/EN 10216-5 03/14 PK 1, bright annealed, Table 6, type of finish: n2, macroscopically free of scoring. |
| Interior surface: | Mechanically polished by drawing, then electrochemically polished. Roughness achieved: Ra ≤ 0.2 µm (guaranteed up to dimension 25.4 mm), Ra max. 0.4 µm (guaranteed over dimension 25.4 mm). Post-cleaning: Rinsing, acidic decapping, final rinsing with DI water. Roughness depth measurement in accordance with ISO 468 and ISO 4288 as well as DIN 4768. |
| Contamination: | Water-soluble residues: maximum 0.1 mg/m². Water-insoluble residues: Max. N 10: ≤ 10 particles ≥ 0.2 µm / ft³. |
| Pipe lengths: | Fixed lengths 5.95 m or 6.00 m ± 50 mm, alternatively lengths of 5-7 m. |
| Testimonial: | According to EN 10204 3.1 B (08/’95). 100 % Eddy current flaw detection according to BS 3889. 100 % optical surface inspection. Roughness depth measurements and other parameters available on request. |
| Packaging / purity assurance: | Tube ends sealed with caps to prevent contamination, packed in PE tubular film in a class 100/10 clean room; in an ultra-pure nitrogen atmosphere on request. Protected against transport and handling damage by appropriate packaging. |
| Certification: | Production in accordance with ISO 9001 / 9002. |