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Core Identification Marks on the Steel Band: Detailed Explanation of Material and Specifications

Release time：2026-02-27

The stamps/imprints on the hose clamp steel band are core identification marks, which mainly include four types of information: clamping range, material configuration (W code), band width/standard/brand. Marked in accordance with industry standards such as DIN3017, the specifications and materials can be identified at a glance.

Overview of Core Marks (Sorted by Frequency of Occurrence)

Mark Type	Example	Meaning	Key Selection Point
Clamping Range	25-40, 84-108	Adaptable outer diameter range of hoses/pipelines (mm)	The outer diameter of the pipeline must fall within the range; it is better to be slightly smaller than larger.
Material Configuration	W1, W2, W4, W5	Component material combination (industry universal)	Determines corrosion resistance, pressure resistance and cost; core for engineering selection.
Band Width	9, 12, 12.7	Steel band width (mm)	The wider the band width, the stronger the clamping force and sealing performance.
Standard/Type	DIN3017, GERMAN TYPE	Implementation standard/hose clamp type (e.g., German type)	Match the installation working conditions and quality requirements.
Brand/Batch Number	Shuang, No.3X	Manufacturer's mark/batch	Trace the source and quality.

Key Detailed Explanation: Material Configuration (W Code)

This is the core of industrial selection. Different W codes correspond to different component materials, which directly affect the applicable scenarios:

W1: Full iron galvanized (steel band + clamp head + screws) → Low cost, suitable for dry indoor and non-corrosive working conditions.
W2: Semi-stainless steel (steel band/clamp head 304, galvanized steel screws) → Cost-effective, suitable for slightly corrosive environments.
W4: Full stainless steel (304) → Strong rust resistance, suitable for outdoor, heating, ventilation and general chemical working conditions.
W5: Full stainless steel (316) → King of corrosion resistance, suitable for marine, offshore and strong corrosive chemical environments.

Interpretation of Complete Examples

Example 1: German-style hose clamp stamp "DIN3017 W4 12 32-50"

DIN3017: Implements German standard, worm gear type hose clamp;
W4: Full 304 stainless steel material;
12: Steel band width 12mm;
32-50: Adaptable to pipeline outer diameter 32-50mm.

Example 2: American-style hose clamp stamp "MS8 W1 8-12"

MS: American-style hose clamp code;
8: Band width 8mm;
W1: Full iron galvanized;
8-12: Adaptable to pipeline outer diameter 8-12mm.

Selection and Identification Skills

Check the range first: The outer diameter of the pipeline must be within the stamped range. For example, a hose clamp of 25-40 cannot be used on a 42mm pipeline.
Match the material second: Choose W4 for humid/outdoor environments, W5 for coastal/chemical industries, and W1/W2 for dry indoor environments.
Band width matching: Choose a band width of 12mm or more for high pressure and large diameter pipelines, and 8-9mm for low pressure and small diameter pipelines.
Pay attention to the unit: All stamps are in millimeters (mm), not inches, to avoid conversion errors.

Reminders of Common Misunderstandings

❌ Mistaking the range for "pipeline diameter specification": For example, 64-80 is the adaptable range, not the pipeline diameter of 64mm.
❌ Ignoring the W code: The price of W1 and W5 of the same specification differs several times; using the wrong one in the wrong environment is prone to rust and water leakage.
❌ Choosing larger instead of smaller: An excessively large range will make the tail of the hose clamp too long, which is easy to loosen and affect the assembly space.

In a word: The imprints on the steel band are the "selection manual" —first check the range to determine the size, then check the W code to determine the material, and finally check the band width to determine the strength. Following this order, there will be no mistakes in procurement and installation.

Do you need me to sort out a "pipeline diameter - hose clamp range - W code" selection comparison table according to your common working conditions (such as fire protection, heating and ventilation, shipping)?

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