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BLACK 90 STREET ELBOW 1-1/2"
$7.99
In stock: 4 available
Product Details
UPC: 692221012247
Brand: DURST
MI Black vs CI Threaded Fittings
Clear comparison for gas, steam, boiler, and mechanical work
MI (Malleable Iron) Black Fittings
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Material — Malleable iron (flexible, impact‑resistant)
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Finish — Black oxide
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Strength — High tensile strength; less brittle
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Best Uses — Natural gas lines, propane, steam, boiler rooms, high‑pressure air
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Threading — Threads grip better; less chance of cracking
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NYC Code — Standard for gas piping
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Common Shapes — 90° elbow, 45° elbow, tee, coupling, union, nipple
CI (Cast Iron) Threaded Fittings
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Material — Cast iron (hard but brittle)
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Finish — Usually galvanized or black
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Strength — Strong but can crack under overtightening
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Best Uses — Water lines, hydronic heating, older building retrofits
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Threading — More rigid; not ideal for vibration
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NYC Code — Not preferred for gas lines
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Common Shapes — 90° elbow, tee, bushing, plug, cap
Quick Visual Differences
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MI Black → Smooth, slightly rounded body; black finish; stronger threads
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CI → Heavier, rougher texture; often galvanized; more brittle
️ Which one to recommend?
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Gas line → MI Black
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Boiler/steam → MI Black
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Water line → CI or galvanized CI
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Old building matching → CI
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High vibration (pump/boiler room) → MI Black
বাংলা সারাংশ
MI Black = গ্যাস, স্টিম, বয়লার—সব ভারী কাজের জন্য সেরা। CI = পানি লাইন, পুরনো বিল্ডিং, কম্পন কম এমন সিস্টেমে ভালো।
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BLACK 90 STREET ELBOW 1-1/2"
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