Every meter of pipe in a building is held up by something — and that something is usually the most under-specified item on the BOQ. Pipe hangers and supports are small, cheap, and absolutely critical: get the hanger wrong and you get sagging lines, failed joints, noise transmission, and inspection failures. Get it right and nobody ever thinks about the hangers again, which is exactly the point.
Tembo Seven Star is the pipe hanger and support brand Ajal Arabia stocks for MEP work across Saudi Arabia: pipe clamps and hangers, pipe supports, U-bolts, pipe straps, J-hooks, gas kits, O-rings, fasteners, dielectric fittings, anchors, bolts, nuts, and washers — the full small-parts package that turns a piping layout into an installed system.
This guide covers the Tembo Seven Star range, how to size and select hangers, where each type is used, and installation notes that prevent the most common site problems — for projects in Riyadh, Jeddah, Dammam, and across the Kingdom.
The Tembo Seven Star Range We Stock
Ajal Arabia stocks the Tembo Seven Star range across seven families that cover virtually every pipe support situation in building services:
Pipe Clamps and Clevis Hangers
The standard suspended-pipe hanger. A clevis hanger cradles the pipe in a U-shaped yoke suspended from a threaded rod — adjustable, secure, and the default choice for horizontal steel pipe runs in HVAC, plumbing, and fire protection. Pipe clamps (two-bolt and three-bolt patterns) grip the pipe for vertical risers and for lines subject to thrust or vibration. For insulated lines, the clamp goes over the insulation with a shield — never compress the insulation.
Loop Hangers and J-Hooks
Loop hangers (split-ring) are the economical choice for small-bore non-insulated lines — copper, CPVC, and small steel pipe in plumbing and HVAC. J-hooks support pipe from a single side where a full loop is impractical: tight ceiling voids, trapeze-adjacent runs, and retrofit work. Fast to install, and the right answer for light-duty suspension.
U-Bolts and Pipe Straps
U-bolts anchor pipe to steel, concrete, or trapeze — the standard for securing lines against movement, guiding thermal expansion, and anchoring at equipment. Pipe straps (one-hole and two-hole) fix small-bore pipe to walls, soffits, and framing. Simple components, but the anchor points of the whole support system — undersize them and the pipe moves where it shouldn’t.
Pipe Supports and Anchors
Beyond hangers: pipe shoes and supports for floor-mounted and rooftop lines, riser clamps for vertical shafts, and anchors that fix the pipe at defined points so thermal expansion goes where the engineer intended (into the expansion loops and offsets, not into the equipment nozzles). Anchors are engineered items — their locations come from the stress analysis, not from the installer’s convenience.
Dielectric Fittings and O-Rings
Dielectric unions and fittings electrically isolate dissimilar metals — the classic case being copper pipe joined to steel, where direct contact in the presence of water drives galvanic corrosion that eats the joint from the inside. O-rings and gaskets in the hanger range serve sealing and cushioning duties: isolating vibration, protecting coated pipe from clamp damage, and sealing accessory connections.
Fasteners: Bolts, Nuts and Washers
The unglamorous half of every hanger assembly: the bolts, nuts, and washers that fix rods to structure, clamps to rods, and trapeze to brackets. Match fastener material and coating to the environment — plain zinc in dry interiors, hot-dip galvanized or stainless in humid plant rooms, coastal sites, and external runs. A hanger is only as corrosion-resistant as its cheapest fastener.
Gas Kits
Pre-assembled accessory kits for gas pipe installations — the clips, spacers, and fixings sized and packaged for gas pipe runs, so the installer isn’t improvising supports on site. Particularly useful on residential and commercial natural gas distribution work where consistent, documented support matters for inspection.
Sizing: How to Size a Pipe Hanger
Hanger sizing is simpler than it looks, and getting it wrong is the most common support failure. Four steps:
- Size the hanger to the pipe’s outside diameter — not the nominal bore. A 2″ steel pipe has an OD of 60.3 mm; the hanger or clamp must match that OD. For insulated lines, size to the OD of the insulation plus the shield, and use an insulated pipe clamp or a clamp over a protection shield — compressing insulation creates a cold bridge and a future corrosion point.
- Size the rod to the load. Threaded hanger rods (typically M8, M10, M12 in MEP work) carry the pipe plus water plus the fitting allowance. Heavier lines — large-bore chilled water, fire mains — need larger rods and verified anchors. When in doubt, go one size up; rod is cheap, a dropped pipe is not.
- Check the anchor. The rod is only as good as what it hangs from: wedge anchors and drop-in anchors in sound concrete, beam clamps on structural steel. The anchor’s rated load must exceed the hanger load with margin — and in fire protection, anchors and hangers must meet the seismic and listing requirements of the system (confirm with the fire protection specification).
- Allow for movement. Hot lines expand; the hanger must permit axial movement where the design expects it (guides and slides) and restrain it where anchors are shown. A hanger that fights thermal expansion will either fail or transfer the load into the pipe.
Hanger Type vs Application: Quick Reference
| Hanger type | Best for | Notes |
|---|---|---|
| Clevis hanger | Suspended horizontal steel pipe | Adjustable; the MEP default |
| Pipe clamp (2/3-bolt) | Risers, thrust restraint, vibration | For vertical runs and dynamic loads |
| Loop hanger | Small-bore non-insulated pipe | Economical; plumbing and light HVAC |
| J-hook | Tight voids, retrofit, single-side support | Fast install where loops won’t fit |
| U-bolt | Anchoring to steel/concrete/trapeze | Secures against movement; guides expansion |
| Pipe strap | Wall/soffit fixing, small bore | One-hole and two-hole patterns |
| Riser clamp | Vertical shafts | Carries the riser’s weight at floor levels |
| Dielectric union | Dissimilar metal joints | Prevents galvanic corrosion |
Where Tembo Seven Star Hangers Are Used
- HVAC — chilled water and condenser water pipe suspension in plant rooms, risers, and ceiling voids across Riyadh, Jeddah, and Dammam commercial towers; duct-adjacent piping and pump connections
- Plumbing — domestic water distribution, drainage stacks (riser clamps at each floor), and sanitary lines in residential and hospitality projects
- Fire protection — sprinkler branch lines and mains, hung to NFPA 13 spacing and support rules with listed-compatible components — hanger spacing and type on fire systems follow the standard, not the installer’s judgment
- Gas distribution — gas kits and strapping for natural gas pipe runs in commercial kitchens and residential blocks
- Industrial — U-bolts, anchors, and supports for utility piping in Jubail and Yanbu plants, with corrosion-appropriate fastener coatings
Installation Notes That Prevent Callbacks
- Follow spacing tables. Maximum hanger spacing depends on pipe material, size, and service — steel, copper, and plastic each have their own limits, and they shrink for insulated or high-temperature lines. Spacing is an engineering value, not a suggestion.
- Protect insulated pipe. Always use shields or insulated clamps; a bare clamp crushing fiberglass or foam insulation is a defect the consultant will flag — and a corrosion trap.
- Isolate dissimilar metals. Copper on steel needs dielectric separation at the joint and often at the hanger (coated or lined clamps). Galvanic corrosion is slow, invisible, and expensive.
- Torque to spec. U-bolts and clamp bolts need firm, even tightening — enough to secure, not enough to deform the pipe. On thin-wall and plastic pipe, deformation is a real risk.
- Mind the structure. Hang from structure, not from ceiling tiles, ductwork, or other trades’ supports. Coordinate hanger points with the structural engineer where loads are significant.
- Leave adjustment. Clevis hangers and rod couplings exist so the line can be leveled after installation — set the pipe to grade, then lock the nuts. Double-nut critical hangers against vibration loosening.
Standards Worth Knowing: MSS SP-58 and SP-69
Two American standards govern pipe hangers and supports, and you will see them referenced on Gulf project specifications:
- MSS SP-58 — covers materials, design, and manufacture of pipe hangers and supports: what hangers are made of and how they are built.
- MSS SP-69 — covers selection and application: which hanger type for which service, with the familiar type-number system (Type 1 clevis hangers, Type 24 U-bolts, and so on).
You do not need to memorize the type numbers — but when a specification calls out “MSS SP-69 Type 1,” you now know it means a clevis hanger, and your supplier should too.
Specifier’s Checklist for Pipe Hangers & Supports
- Schedule hangers with the pipe — hanger type, size, and quantity per line, not as an afterthought allowance.
- Size to OD — pipe outside diameter (plus insulation and shield where applicable), never nominal bore alone.
- Match the environment — fastener and hanger coatings for humidity, coastal air, and external exposure; stainless where the specification demands it.
- Confirm fire protection rules — hanger spacing, type, and seismic requirements on sprinkler systems follow NFPA 13 and the project fire specification.
- Show anchors and guides — anchor points come from the design; guides control expansion direction. Both belong on the drawings.
- Order the small parts together — bolts, nuts, washers, rods, and anchors in the same package as the hangers. A hanger without its rod is a site delay.
Frequently Asked Questions
How do I size a pipe hanger for insulated pipe?
Size to the outside diameter of the insulation plus a protection shield, and use an insulated pipe clamp or a standard clamp fitted over the shield. Never clamp directly onto insulation — compression destroys its thermal performance and creates a corrosion point on the pipe beneath.
What is a dielectric fitting and when do I need one?
A dielectric union or fitting electrically isolates two dissimilar metals — typically copper and steel — at a joint. Without it, galvanic corrosion attacks the joint wherever water (the electrolyte) is present. Use them at every copper-to-steel transition, and consider lined or coated hangers at dissimilar-metal support points.
Clevis hanger vs loop hanger — which should I use?
Use clevis hangers for suspended steel pipe runs — they are adjustable, robust, and the MEP standard. Use loop (split-ring) hangers for small-bore, light-duty, non-insulated lines such as copper plumbing and small HVAC pipe, where economy and speed matter more than adjustability.
What spacing do pipe hangers need?
Spacing depends on pipe material, size, temperature, and whether the line is insulated — steel allows wider spacing than copper or plastic, and hot or insulated lines need closer support. Follow the project specification and MSS SP-69 guidance; on fire protection systems, NFPA 13 sets the spacing rules.
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Hanging pipe on a project in Saudi Arabia? Ajal Arabia stocks the Tembo Seven Star range — pipe clamps and clevis hangers, loop hangers and J-hooks, U-bolts, pipe straps, anchors, dielectric fittings, O-rings, gas kits, and the bolts, nuts, and washers to fix them — sized for your pipe schedule. Call us at +966 555 993140 or send your hanger schedule for a prompt quotation with delivery across the Kingdom.