Attribute Schema Library
Attribute schemaplumbing & PVF

Pipe Hangers & Supports Attributes

Pipe hangers and supports carry piping loads into the building structure: clevis hangers, swivel ring and band hangers, split rings, riser clamps, beam clamps, brackets, rolls, saddles, shields, and the threaded rod between them. MSS SP-58 charts about 60 component types and fixes the minimum design load ratings, allowable stresses and coatings the trade quotes from. Buyers are mechanical and fire-protection contractors, PVF counter staff, and the engineers who write "Anvil Fig. 260 or equal" into Division 21, 22 and 23.

Identity here is the figure number, not the description. Datasheets say "Ordering: specify figure number, pipe size, material and finish," and every manufacturer numbers its own way. One figure is also not one SKU: a clevis figure spans 1/2 in to 30 in and changes rod size, load rating, finish and UL/FM scope across that range.

The numbers buyers actually filter on — maximum recommended load, maximum service temperature, listing scope — sit in a two-page PDF table keyed by size, and never reach the feed.

Core

Every SKU needs these. Without them the record is not a product, it is a row.

Product Type
enum
Adjustable Clevis Hanger

Top-level filter. A clevis hanger, a riser clamp and a beam clamp are not substitutes even at the same load and rod size.

MSS SP-58 Type
enum
Type 1 (Adjustable Steel Clevis Hanger)

Engineers spec by type number — "MSS SP-58 Types 1 and 9" — and submittals get rejected without it. Pairs with SP-69 for selection.

Manufacturer Figure Number
identifier
Fig. 260

The real identity in PVF. Specs read "Anvil Fig. 260 or equal"; the datasheet itself says order by figure number, size, material and finish.

Nominal Pipe / Tube Size
enum · in (NPS) / mm (DN)
NPS 2 (DN 50)

The first filter every buyer touches, and it drives rod size and load rating up the table.

Size Basis
enum
CTS (copper tube)

States what "size" means: IPS, copper tube, ductile iron, or OD over insulation. Without it a 1/2 in record is two different parts.

Pipe / Tube OD
number · in
0.840

The dimension the hanger actually fits, and the only thing that makes size basis machine-checkable. Real datasheets publish it as its own column.

Hanger Rod Size
enum · in
3/8 in-16 UNC

Must match the rod on the job. SP-58 §7.2.1 caps 3/8 in rod at NPS 4 and requires 1/2 in minimum above that.

Maximum Recommended Load
number · lb
730

The number the hanger is selected on. Anvil Fig. 260 rates 730 lb at NPS 2 and 1,940 lb at NPS 6 — it changes within one figure.

Material
enum
Carbon steel (ASTM A36)

Sets allowable stress and the temperature range: SP-58 gives -20 to 650°F carbon steel, 450°F malleable iron, 400°F gray iron.

Finish / Coating
enum
Hot-dip galvanized (ASTM A123)

Corrosion class, temperature limit and price. Electroplate (B633), pre-galv (A653) and hot-dip (A123/A153) are three different products.

Manufacturer Part Number (MPN)
identifier
0500359567

The orderable key. One figure explodes into hundreds of MPNs across size, material and finish; the figure number alone will not transact.

Differentiating

What buyers actually compare on. This is where catalogs win or lose the filter.

Maximum Service Temperature
number · °F
450

Set by material and coating together and derated by the manufacturer — plain 650°F vs galvanized 450°F on the same Anvil figure.

Rod Take-Out (TO)
number · in
2-5/8

Rod hole to pipe centerline. Sets rod length and pipe elevation; SP-58 abbreviates it TO and Anvil tables carry it as a column.

Pipe Contact Liner / Dielectric Barrier
enum
Copper epoxy coated (COPPER-GARD)

What actually isolates copper from steel. SP-58 §10.6 says copper plating is identification, not corrosion protection.

Fits Insulation Thickness
number · in
1-1/2

Shielded and oversized hangers are ordered by insulation thickness; suppliers often encode it in the figure number instead of a field.

Compliance & identifiers

Standards, regulatory data, and the identifiers channels reject you for missing.

UL / FM Listing and Scope
text
UL & ULC Listed 1/2–8 in; FM Approved 3/4–8 in

Required on sprinkler and standpipe work per NFPA 13/14. Scoped by size, finish and orientation — UL 203, FM 1951-1953 — not by figure.

Country of Origin
enum
United States

Buy American and BABA on federal and institutional jobs. Suppliers sell the same clamp in domestic and imported figures — Fig. 636 is literally "Domestic".

GTIN (UPC-A)
identifier
078101234567

Required by Amazon Business and by ASA's Product Data Standard, and the join key between distributor, marketplace and manufacturer feeds.

The fields that aren't in the schema at all

What most pipe hangers & supports catalogs are missing.

The table above is the schema most catalogs already have. These are the attributes that usually aren't in it — each one surfaced by a signal from the live market rather than by an audit of what's already there. This is what Anglera's Schema Foundry does on a real catalog, in this category.

Supplier signal
+ Size Basis (IPS vs CTS vs ductile iron)

National Pipe Hanger's Fig. 110 publishes two tables under one figure: 1/2 in NPS at 0.840 in OD rated 400 lb, and 1/2 in copper tube at 0.625 in OD rated 300 lb. Catalogs carry one "Size: 1/2 in".

Copper-size hanger shipped against a steel line, or the reverse: loose or non-closing fit, and the copper rating is lower than the IPS rating at the same label.

Supplier signal
+ UL / FM Listing Scope (sizes and finishes)

Anvil Fig. 260 is FM Approved 3/4–8 in but UL/ULC Listed 1/2–8 in. NPH Fig. 200 is FM only in NPS 3/4–4 galvanized, UL/ULC 2-1/2–8 excluding 7 in. Catalogs flag the whole figure UL/FM.

A 10 in clevis inherits the figure's UL flag, ships to a sprinkler job, and gets tagged at inspection. The hanger comes back and the floor stops.

Supplier signal
+ Maximum Service Temperature

Anvil's Fig. 260 sheet states plain 650°F, galvanized and epoxy 450°F. National Pipe Hanger states 650°F black, 350°F for electro-galvanized and hot-dip. Neither number is in most catalogs.

No one can filter hangers for a 400°F line. Counter staff guess from the finish name, and galvanized parts land on high-temperature service.

Competitor signal
+ Dielectric Barrier / Copper Compatibility

McMaster's finish rail lists Copper Plated beside Epoxy Coated, PVC Coated and Rubber Coated as one class. SP-58 §10.6 says copper plating is identification, not corrosion protection.

Buyer filters Copper Plated expecting isolation, gets an identification finish, and the copper riser corrodes at every support. Warranty call, not a return.

Supplier signal
+ Fits Insulation Thickness

Insulation thickness is baked into the figure number rather than a field — NPH lists Fig. 310 at 1 in, Fig. 315 at 1-1/2 in, Fig. 320 at 2 in — and shielded hangers are ordered by it.

Buyer searching "2 in pipe, 1-1/2 in insulation" gets nothing, or gets a standard clevis that will not close over the insulation and shield.

How Schema Foundry finds these

Messy in, governed out.

The same value, spelled every way plumbing & PVF suppliers spell it. A filter only works once they agree.

Finish / Coating
Zinc PlatedElectro-GalvanizedEGGalvanizedPre-GalvElectro Galv
Electrogalvanized (ASTM B633)

B633 electroplate, A653 pre-galv and A123/A153 hot-dip are three corrosion classes. "Galvanized" alone merges indoor and outdoor parts.

Nominal Size + Size Basis
1/2"1/2 IPS1/2 CTSDN151/2 copper0.840 OD
NPS 1/2 (IPS, 0.840 in OD)

1/2 in CTS is 0.625 in OD and rates lower than 1/2 in IPS. Same label, different part — the OD is what makes it checkable.

Standard Type Number
Type 1MSS-58 TY1SP58 Type 1WW-H-171E Ty 1A-A-1192A Type 1Adj. Clevis
MSS SP-58 Type 1

Type numbers collide across standards: NPH's Fig. 200 copper clevis is WW-H-171E Type 12, but SP-58 Type 12 is a split pipe clamp.

Maximum Recommended Load
730 lbs730#Max Rec. Load 730WLL 730 lb3.25 kN730 LB.
730 lb

Ferguson labels it Work Load Limit, Anvil Max Rec. Load; SP-58 tabulates lb and kN. One numeric field, one unit, or the filter breaks.

What buyers ask

Every one of these should be answerable from the attributes above. If it isn't, that's a gap.

  • Is this the 1 in hanger for copper tube or for 1 in steel pipe?
  • What's the max recommended load on the 2 in clevis with 3/8 in rod?
  • Is this figure UL Listed and FM Approved in my size, or only some of the range?
  • Can I run galvanized hangers on a 400°F line, or do I need plain black?
  • Does copper-plated actually isolate the copper, or do I need felt or copper epoxy?
  • What rod size do I need for 6 in pipe — is 3/8 in still legal?
  • Is this figure domestic? The job is Buy American.
  • Which figure covers 2 in pipe with 1-1/2 in insulation and a shield?

What channels require

The same SKU, different mandatory fields per destination.

ASA Product Data Standard (PHCP-PVF)
GTIN/UPCMPNManufacturer / brandProduct categorySize + unit of measureCountry of origin
Amazon Business
GTIN (UPC-A)BrandMPNProduct type keywordCountry of originPackage quantity
Distributor webstore faceted search
Product typeFits pipe size + size basisRod sizeMax recommended loadMaterialFinish
Mechanical / FP submittal package
Manufacturer figure numberMSS SP-58 typeMax recommended loadRod sizeUL/FM listing + scopeMax service temperature

Pipe Hangers & Supports data, in practice

Why do two suppliers list different max temperatures for the same galvanized finish?

Because the limit is a manufacturer derating, not a code number. MSS SP-58 Table 1 sets the normal temperature range at -20°F to 650°F for carbon steel, 450°F for malleable iron and 400°F for gray iron, but sets no coating limit. Manufacturers publish their own: Anvil's Fig. 260 sheet states plain 650°F, galvanized and epoxy 450°F. National Pipe Hanger states 650°F for black carbon steel and stainless, 350°F for electro-galvanized and hot-dip galvanized carbon steel. Both are right for their own product. Carry Maximum Service Temperature per SKU from that manufacturer's sheet, and never inherit it across brands.

MSS SP-58 Type 1 or WW-H-171E Type 1 — are they the same thing?

They are different numbering systems that happen to overlap at Type 1. MSS SP-58 charts about 60 component types: Type 1 adjustable steel clevis hanger, Type 10 adjustable swivel ring band hanger, Type 12 extension split pipe clamp, Type 19 top beam C-clamp, Type 40 protection shield, Type 42 riser clamp. Federal Specification WW-H-171E and its successor CID A-A-1192A number differently. National Pipe Hanger's Fig. 200 is listed as "MSS SP-58 Type 1, FS WW-H-171E Type 1 (NPS) and Type 12 (copper tube)" — so Type 12 there is a copper clevis, while SP-58 Type 12 is a split pipe clamp. Store the standard next to the number; "Type 12" alone is ambiguous.

Do copper hangers need their own SKU?

Yes, whenever the OD, the rating or the listing differs — which is usually. Copper tube size is not IPS: 1/2 in CTS is 0.625 in OD against 0.840 in for 1/2 in IPS. National Pipe Hanger's Fig. 110 swivel ring publishes two tables under one figure — 1/2 in NPS at 0.840 in OD rated 400 lb, and 1/2 in copper tube at 0.625 in OD rated 300 lb — and states its UL listing runs 3/4 in to 8 in "excluding copper." A single record labelled "1/2 in" cannot carry both ODs, both loads and both listing states. Split on size basis and put the OD on the record.

Can I put one UL/FM flag on the figure and inherit it to every size?

No. Listings are scoped by size, finish and orientation. Anvil's Fig. 260 is FM Approved in 3/4 in through 8 in but UL and ULC Listed in 1/2 in through 8 in, so sizes 10 in and up carry neither. National Pipe Hanger's Fig. 200 is FM in NPS 3/4–4 galvanized only and UL/ULC in 2-1/2 to 8 excluding 7 in. Its Fig. 635 junior beam clamp is FM for 3/8 in rod only and UL for 3/8 in top-of-beam only. Inherited to children, that flag is wrong for most SKUs in the figure. Store the listing body, the standard (UL 203, FM 1951-1953) and the size/finish scope on the SKU.

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