Blow Pipe for Pulse-Jet Cleaning Systems

Product Specifications

Technical details and manufacturing context for Blow Pipe

Definition

The blow pipe is a critical component within pulse-jet cleaning systems used in industrial dust collection. It serves as the conduit through which high-pressure compressed air pulses are delivered from the solenoid valves to the filter bags. Strategically positioned above the filter bags, the blow pipe contains precisely drilled orifices (nozzles) aligned with each filter bag. When activated, it releases short, powerful bursts of air that travel down the filter bags, creating a reverse flow that dislodges dust cakes from the bag surfaces, enabling continuous filtration operation. Typical blow pipes are manufactured from carbon steel, stainless steel, or aluminum, with material selection depending on the operating environment and required corrosion resistance. Common specifications include nominal diameters from 25 to 100 mm (matching filter bag inlet sizes), lengths from 500 to 6000 mm (customized to the filter housing), and wall thicknesses from 2 to 6 mm (thicker for higher pressures). Operating pressure typically ranges from 0.3 to 0.8 MPa, and operating temperature from -20°C to 120°C. Surface roughness is typically Ra ≤ 3.2 μm, and straightness is ≤ 1.5 mm/m. Nozzle hole diameters range from 6 to 20 mm, with spacing from 50 to 200 mm to match bag pitch. Material grades often specified are 304 or 316L (per ASTM A312), with 316L recommended for corrosive environments. Weight varies from 1.5 to 20 kg depending on length and wall thickness. These parameters serve as reference ranges for procurement and verification. Actual values must be confirmed with the legal manufacturer or supplier for the specific model and application. Standards such as ISO 1127, ISO 1302, and ISO 1101 are referenced for dimensional and quality verification, but do not imply certification of any particular product.

Working Principle

The blow pipe operates by receiving compressed air from a common header through solenoid valves. When a valve opens, compressed air rapidly enters the blow pipe and is expelled through its nozzles. The high-velocity air creates a shock wave that travels down the filter bags, flexing them and breaking the dust cake. The pipe remains pressurized only during the brief cleaning pulse (typically 0.1-0.2 seconds), then returns to atmospheric pressure until the next cycle.

Common Materials

Carbon Steel, Stainless Steel, Aluminum

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	25–100 mm	Matches filter bag inlet sizeISO 1127
Length	500–6000 mm	Custom to filter housing
Wall Thickness	2–6 mm	Thicker for higher pressure
Operating Pressure	0.3–0.8 MPa	Below 0.3 MPa pulse force insufficient
Operating Temperature	-20–120 °C	Above 120°C may deform plastic nozzles
Surface Roughness	Ra ≤ 3.2 μm	Smooth bore reduces pressure lossISO 1302
Straightness	≤ 1.5 mm/m	Ensures even pulse distributionISO 1101
Nozzle Hole Diameter	6–20 mm	Determines pulse flow rate
Nozzle Hole Spacing	50–200 mm	Matches bag pitch
Material	304/316L	316L for corrosive environmentsASTM A312
Weight	1.5–20 kg	Depends on length and wall thickness

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Pipe Body Part
Main structural tube that contains and directs compressed air

Material: Carbon Steel/Stainless Steel
Nozzles/Orifices Part
Precision-drilled holes that direct air pulses into filter bags

Material: Same as pipe body
Mounting Brackets Part
Secure the blow pipe in position above the filter bags

Material: Steel
End Caps Part
Seal the ends of the pipe to maintain pressure integrity

Material: Same as pipe body

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Pulse-Jet Cleaning System

View system integration details

Manufacturers of Blow Pipe

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Frequently Asked Questions

What is the function of a blow pipe in a pulse-jet cleaning system?

The blow pipe delivers short, high-pressure air pulses from solenoid valves to the filter bags. The pulses create a reverse air flow that flexes the bags and dislodges accumulated dust, allowing continuous filtration.

What materials are commonly used for blow pipes?

Common materials include carbon steel, stainless steel, and aluminum. For corrosive environments, stainless steel grades such as 316L are often specified. The choice depends on the application and required durability.

What are typical operating pressure and temperature ranges?

Typical operating pressure is 0.3 to 0.8 MPa, and operating temperature is -20°C to 120°C. These are reference ranges; actual limits must be confirmed with the manufacturer for the specific model.

How should I verify the specifications of a blow pipe?

Check the nominal diameter, length, wall thickness, nozzle hole diameter and spacing, and material grade against your system requirements. Refer to relevant standards (e.g., ISO 1127 for dimensions) and confirm with the supplier that the product meets your needs.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 10 bar (150 psi)
flow rate:	0.5-5.0 m³/min (17.7-176.6 SCFM)
temperature:	-20°C to 150°C
pulse duration:	50-200 milliseconds

Blow Pipe

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

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