DIN 3015 pipe & tube clamps, 6 mm to 406 mm — Tubeclo

Holding a tube, pipe, hose or cable still — and more importantly reducing the mechanical shock and vibration that flowing fluid creates before that energy reaches a fitting or a weld. A run that is not properly clamped works its joints loose over time. The body is a square block with a ribbed bore, and the ribs are what give both the grip and the sound deadening.

Outside diameter, always. The clamp closes around the outside of the line, so the bore of the clamp matches the tube or pipe OD. This is the most common ordering error on clamps: a “1 inch pipe” is 33.7 mm outside, not 25.4, and it needs the group that covers 33.7 — standard group 5, not group 3. Every group and its sizes.

Load and vibration decide it, not size. Standard (6–102 mm) for average load and moderate vibration — mobile equipment, machine tools, instrumentation. Heavy (6–406 mm) for higher load and vibration — mining, metal plant. Twin (6–42 mm) where two lines run close together and one body with two bores saves parts and space. They overlap heavily below 42 mm, so tell us the duty.

They are the smooth‑bore versions. PP and PA have a profiled (ribbed) bore with tension clearance; PPH and PAH are smooth inside, without tension clearance. Tension clearance is the small gap that lets the two halves close down onto the line as the bolts pull up. Same materials, same colours, same temperatures — different grip. If you have been quoted PPH and expected PP, that is the difference. The five body codes.

The body material, and therefore the temperature. Green is polypropylene, −30 to +90 °C. Black is polyamide, −40 to +120 °C. Silver is aluminium, up to +300 °C. It is a genuinely useful convention on site — you can see at a glance whether a clamp is rated for where it is sitting.

Aluminium, by a wide margin. At group 1 it takes 3.5 kN against 0.6 kN in polypropylene — nearly six times. Polyamide overtakes polypropylene from group 3 upward and the gap widens with size. So if load is the constraint, changing the body material is usually cheaper than changing series. Note aluminium is not offered in standard groups 7 and 8, nor anywhere in the twin series. Load tables.

No, and this one catches people. In the twin series the maximum load peaks at group 4D — 2.7 kN in PP, 2.9 in PA — and then drops back at 5D to 1.7 and 2.5. Group 2D at 2.1 kN also beats 3D at 1.9. So on twin you have to read the load table rather than assume it rises with the group number. The twin table.

On the standard series it is M6 right across the range, from group 1 to group 8 — only the length changes, 30 mm up to 125 mm. The heavy series grows the thread with the clamp: M10 at 3S to 5S, M12 at 6S, M16 at 7S, M20 at 8S, M24 at 9S and M30 from 10S to 12S. Twin uses M6 at 1D and M8 from 2D up. UNC equivalents are published alongside. Full list.

The metal parts. SS is stainless SS316; C is carbon steel. That is the last of the seven fields. The catalogue also uses W codes for the surface finish in more detail — W5 is A4 stainless, AISI 316/316Ti, and W4 is A2, which is 304 and not the same thing in salt. If you are specifying for marine or washdown, ask for SS316 / W5 explicitly. The W codes.

Yes, if you design for it. Use a mounting rail: weld the rail once, and clamps then position anywhere along it on rail nuts, added or removed without touching the structure. On standard and twin the rail nut is inserted and turned to a stop to lock; on heavy it slides in. On a base‑plate installation, adding a clamp means welding another plate. All three methods.

Yes — that is one of the reasons to pick Tubeclo. With stacking bolts and safety locking plates, identical bodies mount directly on top of one another, so lines running close together need not sit side by side. The locking plate goes between levels to stop the stacking bolts turning as the next level is tightened, and the top level finishes with a cover plate and hexagon bolts. Stacks work on either a base plate or rail nuts, and double and triple stack sets are standard configurations.

Yes. We hold stock in Johor Bahru and Singapore, and a stocked item can be delivered in under three working days. Our quote is a landed price — transport, currency, duties and taxes are already in the figure, so what you approve is what you pay. Aluminium bodies, SS316 metal parts and the made‑to‑order accessories come in to order and we quote that lead time with the price.

To the figure for your series, group and body material. On the standard series it is 8 N·m in PP, 10 in PA and 12 in aluminium, and that is the same for every group from 1 to 8 because the bolt is M6 throughout. The heavy series climbs with size, to 270 / 450 / 600 N·m at group 12S. Pre‑tighten every bolt by hand first, then torque. Under‑torqued and the body deforms without developing clamping force; over‑torqued and you crack the clamp on installation. Full tables.

It depends whether you mean 1/2 inch nominal bore pipe or 1/2 inch tube, and they are different clamps. A 1/2 inch NB pipe is 21.3 mm outside — that is standard group 3, heavy 4S or twin 3D. A 1/2 inch tube is 12.7 mm outside — standard group 2, heavy 3S or twin 2D. Send us the outside diameter in millimetres and the ambiguity disappears. Every group and its sizes.

Yes, in the great majority of cases. Both are built to DIN 3015, so the series, the groups, the bores, the loads and the torques are the same — a group 4S clamp is a group 4S clamp. Where you should check with us first is the heavy‑series mounting rail and rail nut, which are the parts most likely to differ in detail between makers even when the clamp bore matches. Tell us what is already on the wall and we will match the geometry. Full comparison.

Yes. The metal parts come as W3 galvanized carbon steel ST37 or W5 stainless SS316, and on the part number that is the last field — C for carbon steel, SS for stainless. For marine, offshore or washdown, ask for SS316 / W5 explicitly, and do not accept W4 as equivalent: W4 is A2, which is AISI 304, and it does not behave the same in salt. Stainless comes in to order and we quote that lead time with the price. The W codes.

Yes, two ways. Use the elongated weld plate, which is drilled so it can be bolted down with hex bolts or cap screws instead of welded. Or mount a mounting rail on side brackets and drop the clamps onto rail nuts along it. The rail route is the better one if the layout might change — clamps then slide to position and can be added or removed later without touching the structure. Both are standard set configurations, not specials. The three methods.

That comes from the run length and the tube outside diameter, and on small tube it matters far more than the price of one clamp. Tubeclo publishes sizes, loads and torques but no spacing table in the series catalogues, so we apply DIN 3015 practice: small tube wants a clamp roughly every metre, and spacing opens out to several metres on large pipe. Close it up at bends, valves and pumps, and put one directly behind each threaded coupling. Send the run length and the OD and we will give you the actual count rather than a rule of thumb.

Single parts. The set configurations include genuine single‑item options — cover plate only, weld plate only, elongated weld plate only — so replacing one damaged plate does not mean buying a whole clamp. Clamp halves, rail nuts, stacking bolts and safety locking plates are all individual line items too, which is what makes adding to an existing rail cost what it should. Quote the series letter with the configuration number, because the numbering is not the same across series. Reading the part number.

All of them. The clamp is rated for tube, pipe, hose and cable, and Tubeclo states the design is compatible with cable trays as well. What matters is the outside diameter of whatever you are clamping, not what it is made of — measure the hose over its cover and order the group that covers that figure. On hose, the ribbed PP or PA bore is usually the right choice; where the line needs to move more than a rigid bore allows, the rubber insert series takes over.

Close enough that the tube cannot vibrate between supports or sag under its own filled weight — small‑bore lines need closer spacing than large ones, and every line needs a clamp near pumps, valves and bends, where pressure pulses work the joints hardest. The catalogue does not print a spacing table and we will not invent one: send the tube OD, the working pressure and the run layout, and we will recommend the spacing and the number of clamps with the quotation.

Rule of thumb: PP bodies for general indoor duty to +90 °C; PA where the line runs colder or hotter (−40 to +120 °C); aluminium up to +300 °C beside hot lines. Then pick the hardware, because the plates and bolts corrode long before the polymer body does: galvanized steel for dry indoor plant, stainless steel for coastal, offshore, washdown and chemical environments — in Singapore marine yards and on Malaysian coastal sites, stainless hardware is what survives. If in doubt, send us a photo of the installation.