MECHANICAL SHOCK RESISTANCE

ISO 3127 & ISO 179 Falling Weight & Charpy Impact Test Report (at 0°C)

To ensure thermoplastic pipes do not experience brittle shatter during transportation, trench side handling, and rocky desert soil backfilling, ALFA AL-ARABIA conducts continuous falling weight impact testing in accordance with ISO 3127, BS EN 744, and DIN 8061. Pipes conditioned in refrigerated ethylene-glycol baths at 0°C ± 1°C are struck by heavy hemispherical steel drop hammers from heights up to 2.0 meters.

Standard Impact Test Parameters (ISO 3127 & BS EN 744)

• Striker Geometry: Type d25 (R=12.5mm) for small pipes / Type d90 (R=50mm) for large diameters

• Striker Falling Mass: 0.5 kg to 7.5 kg calibrated weight

• Drop Height: 2,000 mm (2.0 meters) free-fall guide tube

• Conditioning Temperature: 0.0°C ± 0.5°C in chilled liquid bath (min 60 minutes)

• Statistical Criterion: True Impact Rate (TIR) ≤ 10% at 90% confidence level

• Failure Definition: Any through-wall shatter, cracking, or visible rupture

Specimen Nominal Size	Standard & Class	Striker Mass (kg)	Drops Tested	Ruptures / Breaks	True Impact Rate (TIR)	Result
110 mm OD (DN 100)	DIN 8062 PN 16	1.60 kg	32 drops	0 ruptures	0.0% (Spec ≤ 10%)	PASSED
160 mm OD (DN 150)	DIN 19534 SN 8	3.20 kg	32 drops	0 ruptures	0.0% (Spec ≤ 10%)	PASSED
200 mm OD (DN 200)	ASTM D1785 Sch 80	4.00 kg	32 drops	0 ruptures	0.0% (Spec ≤ 10%)	PASSED

Why High Impact Strength Prevents Site Installation Breakage

Under-stabilized or highly filled PVC pipes exhibit severe cold-embrittlement, leading to brittle longitudinal cracking when dropped during trench placement or when angular aggregate backfill is placed over the pipeline. By maintaining strict control over virgin polymer molecular weight (K-value 67-68) and high-dispersion impact modifiers, ALFA pipes retain high toughness and ductility even under severe mechanical impact shock.

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Direct technical answer: Charpy Impact Resistance Test

This engineering resource explains Charpy Impact Resistance Test for designers and reviewers. Use it to clarify definitions, methods, and limitations—then apply project-specific data.

Method, assumptions, and limits

Document formulas and variable definitions when performing calculations. Call out where soil modulus, temperature derating, or surge dominates the result. Link outcomes back to product standards and application hubs for procurement.

Related: products · applications · standards index.

Frequently asked questions

What information is needed to quote Charpy Impact Resistance Test?

Standard, size/pressure class, jointing system, quantities/lengths, fittings list, delivery location, and any submittal/test requirements from the specification.

Can I substitute one pipe standard for another at the same nominal size?

Not without review. Dimensions, pressure classes, and test methods differ across standard families.

How do I contact ALFA for supply?

Use the RFQ form or contact +966 50 183 5126 / sales@alfaalarabia.co. Manufacturing is based at 3rd Industrial City, Jeddah, Kingdom of Saudi Arabia (Aramco Vendor #10116102).

Related resources

Batch-1 knowledge update: ALFA-specific order data must come from approved submittals—this section does not invent ratings or certifications.