- Country of manufactureRussia
- Plant manufacturerРоссия
Fittings class III State standard specification of 6781 St 35GS
GOST 5781 - 82B of dependence on mechanical properties subdivide fittings into the classes A - I (A240), A - II (A300), A - III (A400), A - IV (A600), A - V (A800), A - VI (A1000). The fittings construction are manufactured in cores or hanks. The fittings of the class A - I (A240) are manufactured smooth, the classes A - II (A300), A - III (A400), A - IV (A600), A - V (A800), A - VI (A1000) – a periodic profile.
At the customer's request the fittings of the classes A - II (A300), A - III (A400), A - IV (A600), A - V (A800) – are manufactured smooth. The construction fittings of a periodic profile represent round profiles with two longitudinal edges and cross ledges going on the three - way screw line. For profiles with a diameter of 6 mm the ledges going on the one - way screw line with a diameter of 8 mm – on the two - way screw line are allowed.
The fittings of the class A - II (A300) manufactured in usual execution and a special purpose of As - II (As300), have to have the ledges going on screw lines with identical calling on both parties of a profile.
Fittings of the class A - III (A400) and the classes A - IV (A600), A - V (A800), A - VI (A1000) have to have ledges on the screw lines having on the one hand a profile right, and with another – left calling. Relative shifts of the screw ledges on the parties of a profile divided by longitudinal edges do not normalize.
Fittings of the classes A - I (A240) and A - II (A300) with a diameter up to 12 mm and the class A - III (A400) with a diameter up to 10 mm inclusive produce in hanks or cores, big diameters – in cores.
Fittings of the classes A - IV (A600), A - V(A800) and A - VI (A1000) of all sizes produce in cores, with a diameter of 6 and 8 mm – in coordination of the manufacturer with the consumer in hanks.
The fittings are manufactured of the carbonaceous and low - alloyed steel of the brands specified in the table. For reinforcing cores of the class A - IV (A600) of brand of steel establish in coordination of the manufacturer with the consumer.