They are probably on par with stuff made in India.
A few years back i worked on a major re-fit of a chemical plant in Accrington.
Some bright spark of a manager decided to try save money by ordering a pressure vessel from India.
When it eventually turned up, everything seemed pretty much okay except they hadn't sent any documentation or testing certification.
So a few phone calls to the supplier, i explain to them that i need them to send us all the associated documentation, either paper copies or scanned copies on a CD.
A week or so later, said CD turns up.
I open it up expecting pages of weld test certs, pressure test results etc and there's nothing except a website link.
I click on the link, and it literally takes me to a web page on the suppliers website saying all their equipment is to 'British Standards, PED 5500's, etc etc' and thats it.
Ended up, we had to send it away for a load of 3rd party inspection procedures before we could install it, and the total eventual costs were something like 40% more than if they'd just bought one from a UK manufacturer.