Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D4024-22 – Standard Test Method Technical Guide
📐 Scope and Classification
ASTM D4024‑22 covers machine‑made glass‑fiber‑reinforced thermosetting‑resin (RTRP) flanges, excluding contact‑molded types. It specifies requirements for materials, workmanship, performance, and dimensions. Flanges may be produced integrally with a pipe or fitting, with a socket for adhesive bonding, or for use with a metallic or non‑metallic backup ring. Inch‑pound units are the standard; SI values are given for information only. Classification is by type (method of manufacture), grade (generic resin type), class (joining‑system configuration), and pressure rating. Numerical classifications for burst pressure, sealing test pressure, and bolt torque limit are also assigned. Referenced standards include ASTM D618, D1599, D5421, D5685, and ANSI B16.5.
| 🟦 Classification Parameter | 📐 Definition |
|---|---|
| Type | Method of manufacture (machine‑made) |
| Grade | Generic type of resin (e.g., polyester, epoxy) |
| Class | Configuration of joining system (e.g., socket, integral, backup ring) |
| Pressure Rating | Rated working pressure per ANSI B16.5 classes |
⚙️ Testing and Performance Specifications
Performance is verified through short‑time hydraulic‑pressure testing per ASTM D1599 and conditioning per ASTM D618. The standard also defines sealing test pressure and bolt torque limits to ensure flange integrity under service conditions. Terminology follows ASTM D883, F412, and D1600; the abbreviation for reinforced‑thermosetting‑resin pipe is RTRP. Safety, health, and environmental practices are the user’s responsibility per Section 1.4.
| 📊 Test Method | 🔬 Standard | 🎯 Purpose |
|---|---|---|
| Short‑Time Hydraulic Pressure | D1599 | Determine burst resistance |
| Conditioning for Testing | D618 | Standardize specimen preparation |
| Sealing Test | — | Verify leak‑tightness under pressure |
| Bolt Torque Limit | — | Prevent over‑compression damage |
Tip: For contact‑molded flanges, refer to ASTM D5421. This standard focuses solely on machine‑made products.
Caution: The user must establish appropriate safety, health, and environmental practices before use, as stated in Section 1.4.
❓ Frequently Asked Questions
🔍 What types of flanges are included in ASTM D4024‑22?
Machine‑made fiberglass flanges (integral, socket, and backup‑ring types). Contact‑molded flanges are excluded.
💡 How are flanges classified under this standard?
By type, grade, class, and pressure rating, with additional numerical classifications for burst pressure, sealing test pressure, and bolt torque limit.
⚡ What test methods are required for compliance?
Hydraulic‑pressure testing per ASTM D1599 and conditioning per ASTM D618, plus specified sealing and bolt‑torque tests.
📌 Is there an ISO equivalent to ASTM D4024‑22?
No, as per Note 2 of the standard there is no known ISO equivalent.