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4 BLK MI CAP
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- FPT
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 4
- Size 2:
- 0
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Pipe Fittings
- Product Subgroup:
- Caps
- Product Type:
- Cap
- Product Finish:
- Black
- Product Material:
- Malleable Iron
- Product Weight:
- 4.54 lbs
ASC Engineered Solutions 318901006 – Frequently Asked Questions
1) Will a 4 inch black malleable iron cap thread onto standard 4 inch black steel pipe?
Yes. The ASC Engineered Solutions 4 inch black malleable iron cap has an FPT (female pipe thread) end cut to ASME B1.20.1, the NPT thread standard that 4 inch black steel pipe is threaded to. Thread the cap onto a male pipe end or a threaded nipple with pipe dope or PTFE tape and it seals.
2) Is this 4 inch malleable iron cap approved for fire sprinkler systems?
It carries UL/FM approval, so it can be used on fire protection piping where the contractor's submittal calls for a UL Listed, FM Approved threaded malleable iron fitting. It is a Class 150 standard pattern fitting built to ASME B16.3 for both dimensions and pressure rating.
3) Can I use a black malleable iron cap on a domestic water line?
No. Black malleable iron is for non-potable service, typically gas, fire protection, compressed air, and hydronic or steam lines. The black finish here is uncoated iron with no corrosion protection for wet potable service, so for water supply you want a galvanized or brass cap instead.
4) Is this a standard or extra heavy 4 inch pipe cap?
Standard pattern (STD), which under ASME B16.3 is the Class 150 malleable iron fitting. If the drawing calls for Class 300 extra heavy, this is not the fitting for that line.
5) What is the difference between a pipe cap and a plug for closing off a 4 inch line?
A cap goes over the outside of a male threaded pipe end, which is what this ASC fitting does with its female FPT thread. A plug does the opposite, screwing into a female opening such as a tee branch or a coupling. Look at the end you are closing: male pipe end takes this cap, female port takes a plug.
6) What part number should I order for the ASC 4 inch black malleable iron cap?
Order model 318901006. That is the 4 inch standard pattern black malleable iron cap from ASC Engineered Solutions, with a female NPT end.
7) How heavy is a 4 inch black iron cap, and is it a one-man lift overhead?
It weighs 4.54 lbs, so it is easy to handle overhead on a ladder or lift. Worth allowing for on long horizontal runs where you are capping several stub-outs, but a single fitting is not a two-man item.
8) What grade of iron is this cap made from?
Malleable iron to ASTM A-197, the standard covering cupola malleable iron used for threaded pipe fittings. That is what gives it the ductility to take thread engagement and wrench torque without cracking the way a grey cast fitting would.
How fast can I get the ASC Engineered Solutions 318901006 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ASC Engineered Solutions 318901006 come with a warranty?
Absolutely. The ASC Engineered Solutions 318901006 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ASC Engineered Solutions 318901006?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the ASC Engineered Solutions 318901006 from ZenSupply?
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