▁Chair man ▁of ▁the ▁Pres id ium ▁of ▁the ▁Supreme ▁Soviet . ▁ ▁In ▁ 1 9 7 1 – 1 9 7 9 , ▁Southern ▁C au cas us ▁republic s ▁of ▁the ▁Soviet ▁Union ▁were ▁supplied ▁through ▁this ▁pipeline ▁by ▁natural ▁gas ▁from ▁Iran . ▁ ▁After ▁Iran ian ▁Revolution ▁Iran ian ▁supplies ▁were ▁cut ▁off . ▁ ▁In ▁ 2 0 0 6 , ▁A zer ba ij an ▁began ▁a ▁swap ▁deal ▁with ▁Iran , ▁providing ▁gas ▁through ▁the ▁B aku - A st ara ▁line ▁to ▁Iran ; ▁while ▁Iran ▁supplies ▁ ▁N akh ch ivan . ▁On ▁ 1 1 ▁November ▁ 2 0 0 9 , ▁the ▁State ▁O il ▁Company ▁of ▁A zer ba ij an ▁( SO C AR ) ▁and ▁National ▁Iran ian ▁Gas ▁Company ▁signed ▁a ▁memor and um ▁according ▁to ▁which ▁A zer ba ij ani ▁will ▁supply ▁starting ▁from ▁ 2 0 1 0 ▁ 5 0 0   mill ion ▁cub ic ▁meters ▁of ▁natural ▁gas ▁per ▁year . ▁ ▁Techn ical ▁features ▁The ▁overall ▁length ▁of ▁the ▁pipeline ▁is ▁, ▁of ▁which ▁ ▁in ▁A zer ba ij an . ▁The ▁pipe ▁diameter ▁is ▁▁ ▁and ▁it ▁had ▁original ▁capacity ▁of ▁ 1 0   b ill ion ▁cub ic ▁meters ▁of ▁natural ▁gas ▁per ▁year ▁at ▁. ▁ ▁The ▁Iran ian ▁section ▁of ▁the ▁pipeline ▁is ▁known ▁as ▁I G AT 1 . ▁ ▁References ▁▁ ▁Category : E ner gy ▁infrastr ucture ▁completed ▁in ▁ 1