Paintball compressed-gas cylinder failures

Paintball compressed-gas cylinder failures encompass the rejection, recall, rupture and mechanical failure of pressurised cylinders and associated equipment used in paintball. These include carbon dioxide (CO₂) cylinders and high-pressure air (HPA) systems, commonly operating at service pressures of 3,000 or 4,500 psi.[1][2]

Cylinders can be removed from service following periodic inspection or hydrostatic testing, while manufacturers and regulators may issue recalls or safety notices affecting entire production batches. These measures are distinct from accidents in which a pressurised cylinder or its associated components fail during use.

Documented paintball-related incidents include fatal CO₂ cylinder ruptures, valve-separation accidents, a fatality during an HPA filling operation and fires involving compressed-air equipment.[3][4][5]

Safety notices concerning paintball cylinders have been issued in the United States and Canada, with affected products also distributed in Europe.[6][7][8]

Hydrostatic testing and cylinder rejection

Hydrostatic testing is a periodic requalification procedure used to determine whether a compressed-gas cylinder remains suitable for service.

The cylinder is subjected to a controlled test pressure, with its expansion and subsequent contraction measured against the applicable specification.[1]

Visual inspection and testing can identify defects including:

• Excessive permanent expansion
• Internal corrosion or pitting
• Cracks, dents or damaged cylinder threads
• Damaged composite fibres
• Leakage through the pressure-containing wall
• Other defects exceeding the applicable rejection limits

A cylinder may be rejected during preliminary inspection without undergoing the full hydrostatic pressure test.

Cylinders that fail requalification or meet condemnation criteria are removed from service. The procedure is a normal part of compressed-gas cylinder maintenance and is not limited to the individual cases described in this article.[1][9]

A cylinder described as out of hydro has exceeded its applicable requalification interval without passing a subsequent required test.

An expired test date does not itself prove that the cylinder has suffered structural damage. Conversely, a cylinder within its test period may still require removal from service if damage is discovered.

The testing interval depends on the cylinder's specification, approval, manufacturer requirements and jurisdiction.

International cylinder recalls and safety notices

Global Composites International, Canada, 2005–2007

In its winter 2005–2006 Transportation of Dangerous Goods Newsletter, Transport Canada issued a warning concerning composite cylinders manufactured by Global Composites International (GCI).[6]

GCI had received Canadian approval in September 2003 to manufacture composite cylinders at its San Dimas, California, facility under permit TC-SU 6146.

The company moved production to Ontario, California, in April 2004 without obtaining the required reapproval for the new manufacturing location.

Transport Canada warned that cylinders bearing the TC-SU 6146 marking and manufactured from 1 April 2004 onwards were not compliant with the permit and had to be removed from service.[6]

GCI ceased operations on 1 August 2005.

A further Transport Canada notice published in spring 2007 clarified that the affected cylinders included equipment designed for self-contained breathing apparatus (SCBA), as well as cylinders potentially used in paintball.[7]

The action concerned manufacturing compliance and certification, rather than an identified group of cylinders that had individually failed periodic hydrostatic testing.

Luxfer composite cylinders, Canada, 2006

In spring 2006, Transport Canada published a notice concerning certain carbon-fibre reinforced cylinders manufactured by Luxfer Gas Cylinders in Riverside, California.[8]

The affected products included cylinders designed for paintball markers and breathing apparatus.

They carried the Canadian marking TC-SU 5134 and original test dates between May and September 2005.

According to the regulator, some cylinders had not undergone the required autofrettage process or hydrostatic testing specified by their manufacturing permit.

Luxfer initiated arrangements to identify, recover and test the affected cylinders.

Transport Canada directed owners of affected cylinders to remove them from service until the required remedial measures were completed.[8]

The notice did not establish that every Luxfer cylinder manufactured during this period was affected.

Luxfer cylinder recovery in Europe, 2006

The Luxfer testing issue also affected the European paintball market.

On 13 March 2006, industrial gas publication gasworld reported that Luxfer was attempting to locate composite paintball cylinders that might not have been properly tested by an independent inspection agency.[10]

The publication stated that most affected cylinders had been sold in North America, but a limited number had been distributed in Europe.

This provides direct evidence that the cylinder recovery programme extended beyond the United States and Canada.

The available report does not establish the number of European cylinders recovered or whether any failed subsequent testing.

Wider Luxfer cylinder recovery programme, United States, 2006

In May 2006, the United States Pipeline and Hazardous Materials Safety Administration (PHMSA) issued an advisory concerning 6,325 high-pressure cylinders manufactured or distributed by Luxfer without the required autofrettage and hydrostatic tests.[11]

The notice covered multiple cylinder types used for breathing apparatus, paintball and other applications.

A corrected advisory dated 10 May 2006 reported that 2,581 cylinders had been recovered and identified the remaining affected cylinders by model and serial number.[11]

The total of 6,325 must not be interpreted as the number of paintball cylinders affected or the number that failed hydrostatic testing.

Luxfer stated that cylinders recovered and tested during its investigation had passed the required tests.[12]

The recovery programme concerned incomplete original manufacturing tests, not proof that thousands of cylinders were structurally defective.

Cylinder inspection and rejection outside the United States

United Kingdom

Cylinder requalification is also a routine activity in the British compressed-gas industry.

JC Scuba in Swindon, an IDEST cylinder-testing centre, publishes inspection and hydrostatic-testing procedures covering diving, airgun and paintball equipment.[9]

Its published policy states that cylinders failing the applicable test are destroyed for safety reasons.

The centre identifies five-year hydrostatic testing for certain surface-use cylinders, including paintball cylinders, subject to the cylinder and valve specifications.[9]

These procedures illustrate how unsuitable cylinders are removed from service without an uncontrolled rupture occurring.

The published information does not provide annual numbers or a failure rate specifically for paintball cylinders.

France

The Fédération de Paintball Sportif published compressed-air equipment guidance updated on 6 June 2013.[13]

The document distinguished composite and aluminium cylinders used with paintball markers and identified different periodic inspection requirements.

For composite cylinders, the federation directed operators to follow the period specified by the manufacturer.

The guidance also addressed cylinder markings, inspection of filling equipment, protection against physical damage and verification of certification before filling.[13]

This historical guidance illustrates the existence of regulatory requirements outside the United States. It should not be treated as a definitive statement of current French law without checking subsequent amendments.

Documented cylinder test failures

Crossfire hydrostatic testing, 2006

In July 2006, WARPIG published an article by Bill Mills documenting hydrostatic testing and cylinder refurbishment carried out by Crossfire Air Systems.[1]

Crossfire president Chris Havlock demonstrated the company's resurfacing process using a condemned paintball cylinder that had previously failed hydrostatic testing.

The cylinder was deliberately scratched to demonstrate the distinction between cosmetic damage to its protective coating and structural damage to the composite wrapping.

The report confirmed that the cylinder had failed hydrostatic requalification and been removed from service.

It did not provide the exact reason for the failure.[1]

The cylinder was an illustrative example from an established testing programme, not evidence that hydrostatic-test failures were exceptional.

Internal corrosion, 2018

On 14 November 2018, specialist service Paintball Hydro-Testing published an account of a fibre-wrapped paintball cylinder rejected because of internal corrosion.[14]

The cylinder was approximately eight years old.

Corrosion had produced pitting inside its pressure-containing wall, including damage sufficient to create a pinhole leak.

The testing service identified contaminated compressed air as a possible contributing factor, although the precise cause was not established.

The report did not establish whether the cylinder's hydrostatic certification had expired.

The case demonstrates that internal structural damage may be discovered through inspection even when the cylinder's exterior appears serviceable.

Documented high-pressure air accidents

Fatal filling accident, Connecticut, 2002

On 13 November 2002, WARPIG reported the death of Ralph Sanzeri Jr., a 31-year-old volunteer firefighter who was fatally injured while filling paintball compressed-air equipment at his bait and tackle shop in Thomaston, Connecticut.[3]

Early accounts differed about whether the failure involved the player's cylinder, a storage cylinder or filling equipment.

WARPIG reported that the United States Occupational Safety and Health Administration was investigating the accident.

A subsequent update dated 15 November 2003 stated that preliminary information suggested neither the player's paintball cylinder nor its fill connector had failed.[3]

The published account does not establish the precise cause or identify an expired hydrostatic test as a contributing factor.

The case is a documented fatality involving paintball HPA filling equipment, but not a confirmed fatal rupture of a player's HPA cylinder.

SC Village filling fire, 2002

In August 2002, WARPIG published an account of an HPA filling fire at SC Village in California.[4]

Shawn Townsend of Compressed Air Specialties described an incident in which a player introduced paintgun oil into a leaking fill nipple.

A flash fire occurred during a subsequent filling operation.

Townsend observed black residue on the filling hose and fitting and suggested ignition involving dispersed oil and compressed air.

No injuries or shrapnel were reported.

The filling hose was removed from service and the player was advised to have the cylinder professionally inspected and tested.[4]

Reported filling injury, 2007

In March 2017, Chris DeForge of Paintball Times referred retrospectively to a 2007 accident in which a tank reportedly exploded while being filled on a 2006 Planet Eclipse Ego marker.[15]

The report stated that the player sustained serious burns.

The original incident report, location, cylinder model and investigation findings have not been independently recovered.

The incident is therefore an incompletely documented report of a compressed-gas filling injury, rather than a confirmed structural rupture of an HPA cylinder.

Documented CO₂ cylinder accidents

Fatal valve-separation accidents, 2003–2004

On 24 March 2004, the United States Consumer Product Safety Commission (CPSC) issued a warning following investigations into two fatal paintball CO₂ cylinder accidents.[5]

In June 2003, a 15-year-old boy died after being struck by a pressurised cylinder while removing it from a paintball marker.

In February 2004, a female bystander died when a CO₂ cylinder separated from its valve during disassembly of another person's marker.

In both incidents, the cylinder separated from the valve and was propelled by escaping gas.[5]

These were valve-separation accidents rather than ruptures of the cylinder wall.

Fatal CO₂ cylinder rupture, North Carolina, 2015

On 2 February 2015, Newman Bates died after a nine-ounce paintball CO₂ cylinder ruptured at his home in North Carolina.[16]

The accident was examined in the federal product-liability case Bates v. Tippmann Sports, LLC.

Court records established that the cylinder had been overfilled and its pressure-relief assembly contained two burst discs instead of one.

The defective arrangement prevented the pressure-relief device from operating as intended.

The court record distinguished the defective assembly from the cylinder body, which was not considered defective.[16]

The accident was not attributed to expired hydrostatic certification.

Comparison of documented cases

Year	Country or region	Equipment	Event	Classification
2002	United States	HPA filling equipment	Fatal accident involving Ralph Sanzeri Jr.	Fatality; failed component not conclusively identified.[3]
2002	United States	HPA system	SC Village filling fire	No injuries reported.[4]
2003–2004	United States	CO₂ cylinders	Two valve-separation accidents	Two fatalities.[5]
2005–2007	Canada	GCI composite cylinders	Manufacturing-permit non-compliance	Regulatory withdrawal from service.[6][7]
2006	Canada	Luxfer composite cylinders	Missing required manufacturing tests	Recovery and retesting programme.[8]
2006	Europe	Luxfer paintball cylinders	Affected cylinders distributed in Europe	International product recovery.[10]
2006	United States	Paintball compressed-air cylinder	Crossfire hydrostatic test failure	Cylinder condemned.[1]
2007	Location unverified	HPA suspected	Reported filling explosion	Serious burns reported; original records not recovered.[15]
2015	United States	CO₂ cylinder	Newman Bates rupture	One fatality.[16]
2018	United States	Fibre-wrapped paintball cylinder	Internal corrosion and pinhole leak	Cylinder rejected.[14]

The table includes selected documented incidents and regulatory actions. It is not a complete international register of cylinder-test failures.

Distinguishing recalls from failures

Cylinder safety records describe several different events that should not be conflated.

Inspection rejection occurs when a cylinder is found unsuitable for continued service because of visible damage, internal corrosion or another defect.

Hydrostatic test failure occurs when a cylinder does not satisfy the requirements of the pressure test or associated requalification process.

Manufacturing non-compliance occurs when a cylinder has not been produced, inspected or tested according to its applicable approval.

Product recall or withdrawal is a corrective action affecting identified cylinders or production batches. A recall does not necessarily mean every affected cylinder is physically defective.

In-service failure involves an uncontrolled loss of pressure containment, leakage, structural rupture or failure of another component during operation.

Consequently, a cylinder may be recalled without ever having failed hydrostatic testing, while another may fail inspection without having been the subject of a manufacturer recall.

Hydrostatic certification and accident causation

The documented cases establish that paintball cylinders have been rejected after inspection, failed requalification and been included in international recovery programmes.

They also establish that compressed-gas accidents have caused serious injuries and deaths.

However, the available investigations described in this article do not establish that a fatal paintball cylinder rupture was specifically caused by continued use after expiry of its required hydrostatic certification.

Determining that relationship requires evidence identifying the cylinder, its applicable requirements, inspection history and mechanism of failure.

Regular inspection and requalification are intended to remove unsuitable cylinders from service before an uncontrolled failure occurs.

See also

• Paintball safety
• Hydrostatic testing
• Paintball markers
• Crossfire Air Systems
• SC Village

References

1. Crossfire Hydrotesting and Resurfacing. Bill Mills, photographs by Dawn Mills, WARPIG, July 2006.
2. 49 CFR Part 180, Subpart C: Qualification, Maintenance and Use of Cylinders. United States Department of Transportation, Pipeline and Hazardous Materials Safety Administration.
3. Air Accident Claims Life. Bill Mills, WARPIG, 13 November 2002; updated 15 November 2003.
4. Don't Blow Yourself Up. WARPIG, August 2002.
5. CPSC Issues New Safety Warning for Paintball Guns. United States Consumer Product Safety Commission, 24 March 2004.
6. Non-Compliant Manufacture of Compressed Gas Cylinders Used in Paintball Guns. Nicole Noccey, Transport Canada, Transportation of Dangerous Goods Newsletter, winter 2005–2006.
7. Non-Compliant Manufacture of Compressed Gas Cylinders – New Information. Nicole Noccey, Transport Canada, spring 2007.
8. Non-Compliant Luxfer Composite Gas Cylinders. Pascal Verville, Transport Canada, spring 2006.
9. Cylinder Testing and Servicing. JC Scuba, Swindon, United Kingdom. Published testing and condemnation procedures.
10. Luxfer Cylinders Searches for Un-tested Cylinders. Katri Iivonen, gasworld, 13 March 2006.
11. Correction to Safety Advisory Concerning the Manufacture, Marking, and Sale of Untested Compressed Gas Cylinders. PHMSA, 10 May 2006.
12. Luxfer Issues Notice to Owners and Users of SCBA Cylinders That Need to Be Returned for Testing. Luxfer Gas Cylinders, 21 February 2006.
13. Réglementation Air Comprimé. Fédération de Paintball Sportif, updated 6 June 2013. Historical regulatory guidance.
14. Internal Tank Corrosion. Nick Morrione, Paintball Hydro-Testing, 14 November 2018.
15. Safety Tip: The Internet Isn't Always Right. Chris DeForge, Paintball Times, 9 March 2017.
16. Bates v. Tippmann Sports, LLC, Document 88. United States District Court for the Western District of North Carolina, 9 April 2019.

External links

• Transport Canada, Transportation of Dangerous Goods
• Pipeline and Hazardous Materials Safety Administration
• United States Consumer Product Safety Commission
• Luxfer Gas Cylinders
• Paintball Hydro-Testing