NEW ASME Certification Mark

Since January 1^st, 2013 ASME introduced a new Certification Mark which replaced the old Code Symbol Stamps

Below both versions for your reference and information 

ASME BPV Code Section		Designator	Former Stamp	New
I	Rules for Construction of Power Boilers	S		S
I	Rules for Construction of Power Boilers, Assembly of Power Boilers	A		A
I	Rules for Construction of Power Boilers, Electric Boilers	E		E
I	Rules for Construction of Power Boilers, Miniature Boilers	M		M
I	Rules for Construction of Power Boilers, Pressure piping	PP		PP
I	Rules for Construction of Power Boilers, Pressure Relief Valves	V		V
IV	Rules for Construction of Heating Boilers, Heating Boilers, Cast Iron and Cast Aluminium	H		H
IV	Rules for Construction of Heating Boilers, Heating Boilers, except Cast Iron and Cast Aluminium	H		H
IV	Rules for Construction of Heating Boilers, Heating Boilers, Field Assembly	H		H
IV	Rules for Construction of Heating Boilers, Lined Portable Water Heaters	LWH		HLW
IV	Rules for Construction of Heating Boilers, Heating Boiler Safety Valves	HV		HV
VIII	Rules for Construction of Pressure Vessels - Division One	U		U
VIII	Rules for Construction of Pressure Vessels - Division Two Alternative Rules	U2		U2
VIII	Rules for Construction of Pressure Vessels - Division Three Alternative Rules for Construction of High Pressure Vessels	U3		U3
VIII	Rules for Construction of Pressure Vessels - Division One Miniature Pressure Vessels *	UM		UM
VIII	Rules for Construction of Pressure Vessels - Division One Rupture Disk Devices	UD		UD
VIII	Rules for Construction of  pressure Vessels - Division One Pressure Vessels, Safety Valves	UV		UV
VIII	Rules for Construction of Pressure Vessels - Division Two Pressure Vessels, Safety Valves	UV		UV
VIII	Rules for Construction of Pressure Vessels - Division Three High Pressure Vessels, Safety Valves	UV3		UV3
X	Fiber-reinforced Plastic Pressure Vessels	RP		RP
XII	Rules for Construction and Continued Service of Transport Tanks	T		T
XII	Rules for Construction and Continued Service of Transport Tanks, Safety Valves	TV		TV
XII	Rules for Construction and Continued Service of Transport Tanks, Rupture Disk Devices	TD		TD

* Reviews after the first and second years of each 3 year period are performed by the AIA only / Only in conjunction with a valid U or S Certificate.

WHAT IS HYDROSTATIC TESTING?

WHAT IS HYDROSTATIC TESTING?

Hydrostatic testing is the most common procedure used to qualify newly manufactured cylinders, spheres and tubes used for the transportation of dangerous goods.
Hydrostatic testing is also required periodically to re-qualify these pressure vessels for continued service.
During a hydrostatic test, a pressure vessel is placed inside a closed system, usually a test jacket filled with water, and a specified internal water pressure is applied to the container inside this closed system. The applied internal pressure causes an expansion of the container being tested, and the total and permanent expansion that the container undergoes are measured.
These volumetric expansion  measurements, in conjunction with an internal and external visual inspection of the container, are used to determine if a pressure vessel is safe for continued use, or has suffered from a degradation in its structural integrity and must be condemned.
Some pressure vessels may be re-qualified by means  of a proof-pressure test. This method, also known as a modified hydrostatic test,  consists of subjecting a pressure vessel to a specified internal pressure and inspecting the pressurized container for leaks, bulges or other defects. This method is permitted only when the applicable regulations do not require the determination of volumetric expansion measurements (e.g. for certain types of low pressure cylinders such as those used on many portable fire extinguishers).