What to Know Before You Order
YSC-P-5 Cast Iron Pipe Joint 3/4" belongs to the family of cast and pressed fittings that hold a 28 mm tube frame together. Individually it is a small casting with one bolt; collectively these parts decide whether a workstation behaves as one rigid structure or as a set of tubes leaning against each other.
Points that decide whether it works
- Joint halves are tightened to clamp, not to pin. The structure holds because friction between the coating and the casting exceeds the load trying to rotate the tube — which makes bolt torque a structural specification, not a preference.
- Specified torque for an M6 bolt in this family is typically 8 to 10 Nm. Two fitters working by feel will differ by up to a factor of two, and the frame that holds its rating is the one assembled with a wrench rather than a hex key and good intentions.
- Retorque 24 to 48 hours after assembly. PE and ABS coatings creep under sustained clamping pressure, so a joint set correctly on Monday is measurably looser in three weeks. This is the single most skipped step in every installation.
- Surface finish is a corrosion decision. Zinc plating covers general workshop conditions; chromed or electrophoresed finishes are for visible frames and light washdown; stainless is for humidity, washdown and coastal freight.
- Mark each joint with a paint pen once torqued. A broken line means something moved, and it is visible from across the aisle without touching the frame.
Frequently Asked Questions
How much load can this joint carry?
The joint is rarely the first thing to fail — the tube span usually gives way first, by sagging rather than breaking. What limits a frame is joint stiffness under sideways load, which is why torque and retorquing matter more than the catalogue weight figure.
Can it be reused after dismantling?
Mechanically yes, but clamping force depends on the coating recovering its thickness. After two or three assemblies the joint needs more torque to hold the same load, so treat reuse as a maintenance decision rather than a free option.
Do you supply an ESD version?
Yes. The dissipative version is specified where the workstation is grounded, and it needs to be ordered explicitly rather than assumed — mixing standard and dissipative joints in one frame breaks the path.
